Look no further! In this comprehensive guide, we will explore everything you need to know about these essential components of your vehicle's engine control system. From understanding the functions of the ECU, PCM, and ECM to troubleshooting common problems and finding reliable solutions, we've got you covered. est 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 r...