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. ECUs, PCMs, and ECMs rely on sensors that monitor various parameters such as engine temperature, air intake, throttle position, and more. Based on the data collected from these sensors, the control modules adjust fuel delivery, ignition timi...

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. ECUs, PCMs, and ECMs rely on sensors that monitor various parameters such as engine temperature, air intake, throttle position, and more. Based on the data collected from these sensors, the control modules adjust fuel delivery, ignition timi...