The engine control module (ECM), also known as the powertrain control module (PCM) or engine control unit (ECU), is a vital component in modern vehicles that plays a crucial role in managing the engine’s operation and performance.
It acts as the brain of the vehicle, constantly monitoring and adjusting various systems to ensure optimal performance, fuel efficiency, and emissions control. The ECM receives inputs from various sensors located throughout the vehicle, such as the mass airflow sensor, oxygen sensor, throttle position sensor, and coolant temperature sensor, among others. These sensors provide the …