What is an ECU, PCM, and ECM? Electronic Control Unit (ECU) is a generic term describing any embedded system that controls one or more of a vehicle's electronic systems. The Powertrain Control Module (PCM) is a type of ECU that manages the engine and transmission functions, while the Engine Control Module (ECM) specifically oversees the engine's operation. How do ECUs, PCMs, and ECMs Work? These control modules receive input from various sensors throughout the vehicle, such as the throttl...

What is an ECU, PCM, and Lincoln Zephyr ECM Replacement? Electronic Control Unit (ECU) is a generic term describing any embedded system that controls one or more of a vehicle's electronic systems. The Powertrain Control Module (PCM) is a type of ECU that manages the engine and transmission functions, while the Engine Control Module (ECM) specifically oversees the engine's operation. How do ECUs, PCMs, and ECMs Work? These control modules receive input from various sensors throughout the v...