ECU (Engine Control Unit) The ECU, or Engine Control Unit, is a crucial component in modern vehicles that controls various aspects of the engine's operation. It monitors and manages engine performance, fuel efficiency, emissions, and other critical functions to ensure optimal operation. The PCM is an integrated module that combines the functions of both the ECU and TCM (transmission control module). It oversees the engine and transmission systems, ensuring smooth coordination between the tw...

ECU (Engine Control Unit) The ECU, or Engine Immobilizer System Control Unit, is a crucial component in modern vehicles that controls various aspects of the engine's operation. It monitors and manages engine performance, fuel efficiency, emissions, and other critical functions to ensure optimal operation. The PCM is an integrated module that combines the functions of both the ECU and TCM (transmission control module). It oversees the engine and transmission systems, ensuring smooth coordina...