Some of the functions of the ECM include checking the oxygen to fuel ratio, tracking idle speed, and controlling the variable valve timing as well as the ignition timing to increase power or fuel economy. It regulates several key car functions to ensure that the car is running efficiently. The car computer is an essential component in your car, and it is often referred to as the car’s brain. Today’s vehicles rely on computers, or engine control modules, or units (ECM/ECU), that monitor the sensors in the engine bay to enable the vehicle to perform and function at its optimum.
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