While PCM, ECM, and ECU are often used interchangeably, there are subtle differences between them. The Powertrain Control Module (PCM) typically controls both the engine and transmission, while the Engine Control Module (ECM) focuses solely on the engine. The PCM, or Powertrain Control Module, is an integrated control unit that oversees multiple systems within the powertrain, including the engine, transmission, and emission controls. It ensures seamless coordination between these components f...

While PCM, ECM, and ECU are often used interchangeably, there are subtle differences between them. The Powertrain Control Module (PCM) typically controls both the engine and transmission, while the Engine Control Module (ECM) focuses solely on the engine. The PCM, or Powertrain Control Module, is an integrated control unit that oversees multiple systems within the powertrain, including the engine, transmission, and emission controls. It ensures seamless coordination between these components f...