The engine control module, also called the engine control unit or powertrain control module, is a small computerized unit that regulates all of the engine's components, including the emissions system and timing. Other systems and parts will malfunction if the engine control module is faulty.
The engine control module regulates the timing of the spark that comes from the combustion chamber to start the engine. It adjusts the timing when problems arise.
The release of fuel during acceleration is adjusted by the engine control module. It detects the amount of air flowing into the engine when the gas pedal is pressed and sends a signal to the fuel system to inject fuel accordingly.
The module controls the idle speed of a vehicle. It also maintains the speed set by cruise control. If there are any problems with other automotive components, the module can detect them and then produce computerized codes that represent the malfunctioning parts. These codes are read by mechanics through a diagnostic tool, making it easier to identify a specific problem.
