What is a module in a car?

It is generally a combined control unit, consisting of the engine control unit (ECU) and the transmission control unit (TCU). On some cars, such as many Chryslers, there are multiple computers: the PCM, the Transmission Control Unit, and the Body Control Module, for a total of three separate computers as an example. read more

The engine control module might betray a few hints, even in name alone. Sometimes, the names of automotive components are so bizarre that we forget that some terms are completely intuitive and logical. "Engine control" is a no-brainer; "module" implies it's electrical in nature. read more

An electronic control module is a small electrical component that controls and monitors a number of actuators inside a vehicle's engine. It is often referred to as the brain of an engine, and it dynamically regulates air and fuel mixture, idling speed and ignition timing to ensure ideal engine operation. read more