The powertrain control module, a computerized automotive component that is generally located under a vehicle seat, is essential to the functioning of the engine's system. If it is not performing properly, various vehicle systems, including the transmission and charging system, will fail.
Powertrain control modules are small computers that can detect problems within a vehicle and then generate diagnostic codes representing those problems. A mechanic uses a diagnostic tool to read the powertrain module's codes, making the identification of specific problem areas easier.
The module sends out signals to other parts of the engine, including the camshaft, crankshaft, air intake and ignition to test their temperature and working condition. If bad feedback is received from another part or unit, indicating a problem, the module will send a signal that activates the check engine light on the vehicle's dashboard.
The powertrain control module regulates speed while a vehicle is idling and when cruise control is in use. It also works with the catalytic converter to diminish the number of pollutants emitted from the exhaust.
