The ECM is similar to the ECU but primarily focuses on managing engine functions. It communicates with sensors to regulate fuel delivery, air intake, and exhaust emissions to optimize engine performance. While PCM, ECM, and ECU are often used interchangeably, there are subtle differences between them. The Powertrain Control Module (PCM) typically controls both the engine and transmission, while the Engine Control Module (ECM) focuses solely on the engine. The ECM is similar to the ECU in f...

The ECM is similar to the ECU but primarily focuses on managing engine functions. It communicates with sensors to regulate fuel delivery, air intake, and exhaust emissions to optimize engine performance. While PCM, ECM, and ECU are often used interchangeably, there are subtle differences between them. The Powertrain Control Module (PCM) typically controls both the engine and transmission, while the Engine Control Module (ECM) focuses solely on the engine. The ECM is similar to the ECU in f...