Common Symptoms Of A Failing ECMMintt
How do I know if my ECM is bad?ECM manages various functions of your car. Some of the ECM failure symptoms can lead to a faulty wire or break a sensor, instead of affecting the ECM itself. Whether you have an illuminated check engine light or not here are some symptoms that can help you identify powertrain control module failures.
- Abrupt loss of acceleration
- Irregular or rough shifting
- The engine does not start
- Dead battery
- The engine shuts off without a reason
- Bad fuel economy
- High voltage – most cars’ engine computers are made to handle only a specific quantity of voltage. Thus, high voltage might burn out its circuit board, which leads to PCM failure.
- Moisture and corrosion – corrosion might attack your PCM through its wiring harness while moisture might creep in due to a problem in the seals in the PCM itself. Both moisture and corrosion will lead to PCM failure.
- Fuel solenoid – it might lead to a short in the powertrain control module. It happens because of corrosion in the solenoid. Fuel solenoid can also occur because of a wire running from the solenoid to your PCM harness.
- Jump-start – jump-starting a vehicle with improper cable connection can lead to a spike in the PCM and cause such a PCM to short out. Therefore, if you recently jump-started your car with improper cable connection, there is a possibility of PCM failure.
- Grounding problems – poor grounding might lead to PCM failure. It can be a result of a corroded or lose ground wires to your battery or the frame.
- Dead battery cells – leaving your battery in the rig when the cells are dead can affect the grounding in your battery, which cause PCM failure.
- Idle speed
- Air-fuel ratio
- Ignition timing
- Variable valve timing