What is an ECU, PCM, and ECM? Electronic Control Unit (ECU) is a generic term describing any embedded system that controls one or more of a vehicle's electronic systems. The Powertrain Control Module (PCM) is a type of ECU that manages the engine and transmission functions, while the Eagle Vision Engine Control Module Control Module (ECM) specifically oversees the engine's operation. ECU car vs. PCM car vs. ECM in car While ECU, PCM, and ECM are often used interchangeably, there are sligh...

What is an ECU, PCM, and ECM? Electronic Control Unit (ECU) is a generic term describing any embedded system that controls one or more of a vehicle's electronic systems. The Powertrain Control Module (PCM) is a type of ECU that manages the engine and transmission functions, while the Engine Control Module (ECM) specifically oversees the engine's operation. ECU car vs. PCM car vs. ECM in car While ECU, PCM, and ECM are often used interchangeably, there are slight distinctions based on thei...