What is ECM? The Engine Control Module (ECM) is another term used interchangeably with ECU in some contexts. However, ECM typically refers to older, less advanced systems that focus solely on engine functions without the broader scope of the PCM. The ECU receives input from various sensors in the vehicle, such as the oxygen sensor, throttle position sensor, and mass airflow sensor. Based on this input, the ECU makes real-time adjustments to the engine's operation to optimize performance and ...

What is ECM? The Engine Control Module (ECM) is another term used interchangeably with ECU in some contexts. However, ECM typically refers to older, less advanced systems that focus solely on engine functions without the broader scope of the PCM. The ECU receives input from various sensors in the vehicle, such as the oxygen sensor, throttle position sensor, and mass airflow sensor. Based on this input, the ECU makes real-time adjustments to the engine's operation to optimize performance and ...