The Engine Control Module (ECM) is another term used interchangeably with the ECU or PCM, depending on the vehicle manufacturer. It performs similar functions in monitoring and regulating engine performance but may have slight variations in design and features. Check engine light is illuminated Engine misfires or stalls Decreased fuel efficiency ...

The Engine Control Module (ECM) is another term used interchangeably with the ECU or PCM, depending on the vehicle manufacturer. It performs similar functions in monitoring and regulating engine performance but may have slight variations in design and features. Check engine light is illuminated Engine misfires or stalls Decreased fuel efficiency ...