ECU car vs. PCM car vs. ECM in car While ECU, PCM, and ECM are often used interchangeably, there are slight distinctions based on their applications. An ECU typically focuses on engine-related functions, while a PCM integrates additional capabilities for managing the powertrain system. On the other hand, an ECM may encompass broader control over the engine and emission systems in some vehicles. PCM (Powertrain Control Module) The PCM, or Powertrain Control Module, is an integrated control...

est Check engine light or other warning lights Poor fuel efficiency Engine misfires or stalling ...

est Check engine light or other warning lights Poor fuel efficiency Engine misfires or stalling ...