How do ECUs, PCMs, and ECMs Work? These control modules receive input from various sensors throughout the vehicle, such as the throttle position sensor, oxygen sensor, and mass air flow sensor. They use this information to make real-time adjustments to fuel injection, ignition timing, and other critical functions to optimize performance and efficiency. The ECM, or Engine Control Module, is similar to the ECU in that it manages engine functions but is typically used in older vehicle models. ...

How do ECUs, PCMs, and ECMs Work? These control modules receive input from various sensors throughout the vehicle, such as the throttle position sensor, oxygen sensor, and mass air flow sensor. They use this information to make real-time adjustments to fuel injection, ignition timing, and other critical functions to optimize performance and efficiency. The ECM, or Engine Control Module, is similar to the ECU in that it manages engine functions but is typically used in older vehicle models. ...