Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH.

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Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

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Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Roaring sound coming out of the tyre/wheel area: Typically, when a wheel hub assembly goes bad it’s actually the wheel bearing inside the single assembly that is damaged. This part will make a roaring sound, similar to a metal-to-metal grinding sound when the bearing is wearing out. This sound is caused by lack of lubrication inside the bearing, a misaligned bearing or one that has cracked due to impact with another object. It’s very difficult to determine by sound which wheel bearing is going bad as the sound can be very misleading. However, if one side wheel hub assembly is broken, both sides on the same axle need to be replaced at the same time. If you notice any roaring or grinding sound coming from the front end of your vehicle, safely drive home and contact a local a mechanic as soon as possible. Steering wheel vibrates or feels loose: Another indication of a damaged wheel hub assembly is when the steering wheel vibrates at lower speeds and progressively gets worse as the car accelerates. A damaged wheel hub assembly can also cause the steering wheel to feel loose when you’re driving down the road, making turns or negotiating dips in the road. The reason for this is commonly due to a worn out wheel bearing inside the hub assembly. If you notice this symptom, it’s recommended to contact an experienced mechanic as soon as possible so he can road test your vehicle. This is often the best way to properly diagnose what is actually causing the vibration in the steering wheel and can save you a lot of time and money on replacing the wheel hub assembly. Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Kunle Shonaike Some of the most irritating noises that can come from the wheel area of a vehicle are from a bad hub. The raw metal-grinding-on-metal sound can be utterly nauseating. Common signs include a roaring sound from the tyres area, vibrating steering wheel, play in the tyre/wheel combo, and clicking sound from the wheels. Today’s modern cars, and those manufactured after 1997 are equipped with a single bearing and hub assembly that is attached to each wheel and tyre on a vehicle. The wheel hub assembly includes wheel studs that attach the wheels of the vehicle to the car and is mounted to the steering and suspension system on the front end and the rear axle on the rear end. In theory, this single wheel hub assembly should last the lifespan of the vehicle. However, like any other mechanical device, it is subject to wear and tear and can break or wear out prematurely. The wheel hub assembly is prone to damage caused by multiple driving situations such as hitting pot holes, striking kerbs being involved in vehicle collisions. Although this part takes a tremendous amount of abuse, it’s commonly overlooked when repairs are done to other mechanical components such as tyres and wheels, suspension parts, coils, shocks and struts and other front end and rear end housing parts. When the part is damaged or is beginning to show signs of premature wear, it will commonly show some warning signs or symptoms that can be easily recognised by most car owners. Listed below are a few of the symptoms that car owners should be aware of which will alert them to a bad or failing wheel hub assembly. Roaring sound coming out of the tyre/wheel area: Typically, when a wheel hub assembly goes bad it’s actually the wheel bearing inside the single assembly that is damaged. This part will make a roaring sound, similar to a metal-to-metal grinding sound when the bearing is wearing out. This sound is caused by lack of lubrication inside the bearing, a misaligned bearing or one that has cracked due to impact with another object. It’s very difficult to determine by sound which wheel bearing is going bad as the sound can be very misleading. However, if one side wheel hub assembly is broken, both sides on the same axle need to be replaced at the same time. If you notice any roaring or grinding sound coming from the front end of your vehicle, safely drive home and contact a local a mechanic as soon as possible. Steering wheel vibrates or feels loose: Another indication of a damaged wheel hub assembly is when the steering wheel vibrates at lower speeds and progressively gets worse as the car accelerates. A damaged wheel hub assembly can also cause the steering wheel to feel loose when you’re driving down the road, making turns or negotiating dips in the road. The reason for this is commonly due to a worn out wheel bearing inside the hub assembly. If you notice this symptom, it’s recommended to contact an experienced mechanic as soon as possible so he can road test your vehicle. This is often the best way to properly diagnose what is actually causing the vibration in the steering wheel and can save you a lot of time and money on replacing the wheel hub assembly. Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Today’s modern cars, and those manufactured after 1997 are equipped with a single bearing and hub assembly that is attached to each wheel and tyre on a vehicle. The wheel hub assembly includes wheel studs that attach the wheels of the vehicle to the car and is mounted to the steering and suspension system on the front end and the rear axle on the rear end. In theory, this single wheel hub assembly should last the lifespan of the vehicle. However, like any other mechanical device, it is subject to wear and tear and can break or wear out prematurely. The wheel hub assembly is prone to damage caused by multiple driving situations such as hitting pot holes, striking kerbs being involved in vehicle collisions. Although this part takes a tremendous amount of abuse, it’s commonly overlooked when repairs are done to other mechanical components such as tyres and wheels, suspension parts, coils, shocks and struts and other front end and rear end housing parts. When the part is damaged or is beginning to show signs of premature wear, it will commonly show some warning signs or symptoms that can be easily recognised by most car owners. Listed below are a few of the symptoms that car owners should be aware of which will alert them to a bad or failing wheel hub assembly. Roaring sound coming out of the tyre/wheel area: Typically, when a wheel hub assembly goes bad it’s actually the wheel bearing inside the single assembly that is damaged. This part will make a roaring sound, similar to a metal-to-metal grinding sound when the bearing is wearing out. This sound is caused by lack of lubrication inside the bearing, a misaligned bearing or one that has cracked due to impact with another object. It’s very difficult to determine by sound which wheel bearing is going bad as the sound can be very misleading. However, if one side wheel hub assembly is broken, both sides on the same axle need to be replaced at the same time. If you notice any roaring or grinding sound coming from the front end of your vehicle, safely drive home and contact a local a mechanic as soon as possible. Steering wheel vibrates or feels loose: Another indication of a damaged wheel hub assembly is when the steering wheel vibrates at lower speeds and progressively gets worse as the car accelerates. A damaged wheel hub assembly can also cause the steering wheel to feel loose when you’re driving down the road, making turns or negotiating dips in the road. The reason for this is commonly due to a worn out wheel bearing inside the hub assembly. If you notice this symptom, it’s recommended to contact an experienced mechanic as soon as possible so he can road test your vehicle. This is often the best way to properly diagnose what is actually causing the vibration in the steering wheel and can save you a lot of time and money on replacing the wheel hub assembly. Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Steering wheel vibrates or feels loose: Another indication of a damaged wheel hub assembly is when the steering wheel vibrates at lower speeds and progressively gets worse as the car accelerates. A damaged wheel hub assembly can also cause the steering wheel to feel loose when you’re driving down the road, making turns or negotiating dips in the road. The reason for this is commonly due to a worn out wheel bearing inside the hub assembly. If you notice this symptom, it’s recommended to contact an experienced mechanic as soon as possible so he can road test your vehicle. This is often the best way to properly diagnose what is actually causing the vibration in the steering wheel and can save you a lot of time and money on replacing the wheel hub assembly. Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Although this part takes a tremendous amount of abuse, it’s commonly overlooked when repairs are done to other mechanical components such as tyres and wheels, suspension parts, coils, shocks and struts and other front end and rear end housing parts. When the part is damaged or is beginning to show signs of premature wear, it will commonly show some warning signs or symptoms that can be easily recognised by most car owners. Listed below are a few of the symptoms that car owners should be aware of which will alert them to a bad or failing wheel hub assembly. Roaring sound coming out of the tyre/wheel area: Typically, when a wheel hub assembly goes bad it’s actually the wheel bearing inside the single assembly that is damaged. This part will make a roaring sound, similar to a metal-to-metal grinding sound when the bearing is wearing out. This sound is caused by lack of lubrication inside the bearing, a misaligned bearing or one that has cracked due to impact with another object. It’s very difficult to determine by sound which wheel bearing is going bad as the sound can be very misleading. However, if one side wheel hub assembly is broken, both sides on the same axle need to be replaced at the same time. If you notice any roaring or grinding sound coming from the front end of your vehicle, safely drive home and contact a local a mechanic as soon as possible. Steering wheel vibrates or feels loose: Another indication of a damaged wheel hub assembly is when the steering wheel vibrates at lower speeds and progressively gets worse as the car accelerates. A damaged wheel hub assembly can also cause the steering wheel to feel loose when you’re driving down the road, making turns or negotiating dips in the road. The reason for this is commonly due to a worn out wheel bearing inside the hub assembly. If you notice this symptom, it’s recommended to contact an experienced mechanic as soon as possible so he can road test your vehicle. This is often the best way to properly diagnose what is actually causing the vibration in the steering wheel and can save you a lot of time and money on replacing the wheel hub assembly. Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The wheel hub assembly is prone to damage caused by multiple driving situations such as hitting pot holes, striking kerbs being involved in vehicle collisions. Although this part takes a tremendous amount of abuse, it’s commonly overlooked when repairs are done to other mechanical components such as tyres and wheels, suspension parts, coils, shocks and struts and other front end and rear end housing parts. When the part is damaged or is beginning to show signs of premature wear, it will commonly show some warning signs or symptoms that can be easily recognised by most car owners. Listed below are a few of the symptoms that car owners should be aware of which will alert them to a bad or failing wheel hub assembly. Roaring sound coming out of the tyre/wheel area: Typically, when a wheel hub assembly goes bad it’s actually the wheel bearing inside the single assembly that is damaged. This part will make a roaring sound, similar to a metal-to-metal grinding sound when the bearing is wearing out. This sound is caused by lack of lubrication inside the bearing, a misaligned bearing or one that has cracked due to impact with another object. It’s very difficult to determine by sound which wheel bearing is going bad as the sound can be very misleading. However, if one side wheel hub assembly is broken, both sides on the same axle need to be replaced at the same time. If you notice any roaring or grinding sound coming from the front end of your vehicle, safely drive home and contact a local a mechanic as soon as possible. Steering wheel vibrates or feels loose: Another indication of a damaged wheel hub assembly is when the steering wheel vibrates at lower speeds and progressively gets worse as the car accelerates. A damaged wheel hub assembly can also cause the steering wheel to feel loose when you’re driving down the road, making turns or negotiating dips in the road. The reason for this is commonly due to a worn out wheel bearing inside the hub assembly. If you notice this symptom, it’s recommended to contact an experienced mechanic as soon as possible so he can road test your vehicle. This is often the best way to properly diagnose what is actually causing the vibration in the steering wheel and can save you a lot of time and money on replacing the wheel hub assembly. Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

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What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Jun 30, 2023 — If you are driving your car and it makes a noise when turning and it sounds like grinding, poor wheel bearings can be the cause behind it.

A bad camshaft sensor can disrupt your vehicle's smooth operation by diminishing engine performance, reducing fuel efficiency, and posing safety concerns.

Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The average price of a 2017 Ford Explorer wheel bearing replacement can vary depending on location. Get a free detailed estimate for a wheel bearing ...

Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

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engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

2017122 — If you hear grinding noises when driving and braking, try braking a little harder. If the sound gets worse, then you may have worn out brake ...

Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

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Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Some of the most irritating noises that can come from the wheel area of a vehicle are from a bad hub. The raw metal-grinding-on-metal sound can be utterly nauseating. Common signs include a roaring sound from the tyres area, vibrating steering wheel, play in the tyre/wheel combo, and clicking sound from the wheels. Today’s modern cars, and those manufactured after 1997 are equipped with a single bearing and hub assembly that is attached to each wheel and tyre on a vehicle. The wheel hub assembly includes wheel studs that attach the wheels of the vehicle to the car and is mounted to the steering and suspension system on the front end and the rear axle on the rear end. In theory, this single wheel hub assembly should last the lifespan of the vehicle. However, like any other mechanical device, it is subject to wear and tear and can break or wear out prematurely. The wheel hub assembly is prone to damage caused by multiple driving situations such as hitting pot holes, striking kerbs being involved in vehicle collisions. Although this part takes a tremendous amount of abuse, it’s commonly overlooked when repairs are done to other mechanical components such as tyres and wheels, suspension parts, coils, shocks and struts and other front end and rear end housing parts. When the part is damaged or is beginning to show signs of premature wear, it will commonly show some warning signs or symptoms that can be easily recognised by most car owners. Listed below are a few of the symptoms that car owners should be aware of which will alert them to a bad or failing wheel hub assembly. Roaring sound coming out of the tyre/wheel area: Typically, when a wheel hub assembly goes bad it’s actually the wheel bearing inside the single assembly that is damaged. This part will make a roaring sound, similar to a metal-to-metal grinding sound when the bearing is wearing out. This sound is caused by lack of lubrication inside the bearing, a misaligned bearing or one that has cracked due to impact with another object. It’s very difficult to determine by sound which wheel bearing is going bad as the sound can be very misleading. However, if one side wheel hub assembly is broken, both sides on the same axle need to be replaced at the same time. If you notice any roaring or grinding sound coming from the front end of your vehicle, safely drive home and contact a local a mechanic as soon as possible. Steering wheel vibrates or feels loose: Another indication of a damaged wheel hub assembly is when the steering wheel vibrates at lower speeds and progressively gets worse as the car accelerates. A damaged wheel hub assembly can also cause the steering wheel to feel loose when you’re driving down the road, making turns or negotiating dips in the road. The reason for this is commonly due to a worn out wheel bearing inside the hub assembly. If you notice this symptom, it’s recommended to contact an experienced mechanic as soon as possible so he can road test your vehicle. This is often the best way to properly diagnose what is actually causing the vibration in the steering wheel and can save you a lot of time and money on replacing the wheel hub assembly. Tyre/wheel combination has a lot of play when in the air: Most of the time, this symptom will be noticed by a good tyre and wheel care mechanic, or brakes replacement service technician, or oil change centre that is rotating your tyres. When the vehicle is on a hydraulic lift or on jack stands, and the tyre/wheel combo is tightly attached to the wheel hub assembly, but wiggles from left to right or up and down when pulled, this is an indication of a broken wheel hub assembly and should be replaced immediately. Once again, broken wheel hub assemblies should be replaced in pairs on the same axle. Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

What is 750/300 reduced to its lowest terms? 750/300 simplified to its simplest form is 5/2. Read on to view the stepwise instructions to simplify ...

Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Clicking sound from the wheels: Finally, if you hear a clicking sound that increases in speed as the vehicle accelerates, this could be a problem with the wheel hub assembly as well. In this case, the brake caliper will move up and down and hit the top of the wheels as the vehicle drives down the street. This is due to the wheel hub assembly bearing being broken. Parts of this piece are culled online. Feedback I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Acryli ...

ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

I have a 2002 Nissan Pathfinder. The car air conditioning system has been working perfectly. Suddenly, I discovered it’s not cooling again and I took it to an auto technician for checks but ended up replacing the compressor. I used it for a few weeks and the problem persists. I took the car back for more than three times he would refill gas and later work for a week or two and stopped working again. Please, I will like to inquire what it will take to fix this problem permanently. Akin The problem is that the A/C system still has a leak, and the leak could be anywhere on the system. And the most and likely difficult location will be the evaporator, but the technician must have a leak detector to be able to isolate and find the leak. I drive a 2010 Corolla. The steering is electric – it doesn’t use oil. It makes a grinding noise when the steering is turned on at times, especially when I’m reversing. What could be the fault? Please help. The grinding noise will most likely be coming from the bearings of the electric motor of the power steering. In most cases, you will have to replace the complete motor. I have a Ford Focus 2012 model manual gear transmission, the clutch pedal went flat. If the ignition is on, it will not go into any gear, but if the ignition is off, the gear will be engaged, at a point somebody helped in bedding the gear through the small hose-pipe that is attached to the gear box by pumping the clutch pedal and brake oil was coming out of it and fixed back and it picked up again but now it is not picking again and there is oil in the brake compartment but oil is not coming out of the hose-pipe that is attached to the gear box if the clutch pedal is pump now. The clutch pedal is flat now and gear is not engaging if the engine is on but once the engine is off it will engage The problem is that there is air trapped in the fluid of the clutch system. And sometimes the only way to solve the problem is to replace the clutch master cylinder and the slave cylinder (down clutch) as a complete unit (new). What could cause check engine light to be on dashboard? Does it have any effect on the engine? And what can I do for the check engine light to be off? Yes it does have an effect on the power-train system. But the only way to find out what the problem was is to run a scan on the power-train system of the vehicle. Because it’s going to eventually affect the drivability of the vehicle. My EOD 2007 v6 timing belt jumped and the valves was repaired; since then, my car will accelerate but when it comes to the time to load the gear, it won’t accelerate anymore. Please, what could be the problem? Oye Please run a scan on the power-train system of the vehicle and let me have the results. The result will help in solving the problem. Generic codes: P0576: Cruise control input circuit low The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Feb 9, 2024 — The most common mechanical failure is due to a seal leak, which allows the lubricating grease to exit the bearing, and water and grit managing ...

P0577: Cruise control input circuit high The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. When is the code detected? The P0577 codes are set when there is a malfunction with the cruise control system. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0578: Cruise control multi-function input ‘A’ circuit stuck The engine control module monitors the cruise control system. The ECM sets the OBDII code when the cruise control system is not to factory specifications. Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control function switch Cruise control function switch harness is open or shorted Cruise control function switch circuit poor electrical connection P0579: Cruise control multifunction input ‘A’ circuit range/performance The engine control module monitors the cruise control multi-function input ‘A’. The ECM sets the OBDII code when the cruise control multi-function input ‘A’ is not to factory specifications. When is the code detected? The ECM has detected a multifunction switch A input error Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]

Possible symptoms Engine light on (or service engine soon warning light) Cruise control system inoperative Possible causes Faulty cruise control multifunction switch Cruise control multifunction switch harness is open or shorted Cruise control multifunction switch circuit poor electrical connection P0580: Cruise control multifunction switch circuit low voltage. The cruise control switch is an input to the body control module (BCM). The BCM monitors the cruise control on/off, set/coast, resume/accelerate and cancel switches via the cruise control switch signal circuit in order to detect when the driver has requested to perform a cruise control function. The BCM detects a specific voltage signal on the cruise control switch signal circuit when a switch is applied. The engine control module receives the requested cruise control switch function from the BCM via a serial data message. The BCM monitors the cruise control switch. The BCM sets the OBDII code when the cruise control switch is not to factory specifications. Possible causes Faulty cruise control switch Cruise control switch harness is open or shorted Cruise control switch circuit poor electrical connection Faulty body control module P0600: Loss of serial communication link The Engine control module sets the OBDII code when is unable to communicate with other control modules. P0600 possible causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0601: Control module read only memory There is a problem with the ECM/PCM read only memory or read access memory. Possible Causes Faulty engine control module Engine control module harness is open or shorted Engine control module circuit poor electrical connection Low battery voltage P0602: Control module programming error Related News Safety tips for automotive A/C repair Hybrid vehicle A/C compressor Electric vehicle regenerative braking This diagnostic trouble code indicates a programming error within the engine control module. Possible Causes Engine control module not programmed ECM programme Faulty ECM Wrong ECM P0603: Internal control module keep alive memory error Battery voltage is supplied to the engine control module/power-train control module even when the ignition switch is turned off for the ECM/PCM memory function of the DTC memory, the air fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. When is the code detected? Indicates the engine control module/power-train control module has experienced an internal memory fault. Tech notes Start by charging the vehicles battery and clean terminal. Once the battery is charged and the terminals are clean and secured, erase code. If the code comes back on, then you may have to reprogramme or replace engine control module/power-train control module Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0604: Internal control module random access memory error The engine control module/power-train control module continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM/PCM is functioning properly. If any malfunction is detected, the ECM/PCM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the engine control module/power-train control module fuse; if the fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Loose or poor battery terminal connection Low battery charge Engine control module/power-train control module power supply circuit is open or shorted ECM/PCM programming Faulty ECM/PCM P0605: Control module fault The engine control module continuously monitors its own internal memory status, internal circuits and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the P0605 code and illuminates the MIL. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module may be faulty ECM harness power supply circuit is open or shorted ECM harness ground circuit is open or shorted P0606: ECM/PCM processor fault The engine control module continuously monitors its internal memory status, internal circuits and output signals to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light. When is the code detected? Indicates the ECM has experienced an internal memory fault. Tech notes Check the ECM fuse; if fuse is okay, try erasing the code first and if the code comes back, you may have to reprogramme or replace the ECM/PCM. Possible symptoms Engine light on (or service engine soon warning light) Engine may not start Possible causes Engine control module harness power supply circuit is open or shorted; engine control module programming; and faulty engine control module. Copyright PUNCH.                All rights reserved. This material, and other digital content on this website, may not be reproduced, published, broadcast, rewritten or redistributed in whole or in part without prior express written permission from PUNCH. Contact: the[email protected]