Powertrain Control Module PCM
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The Powertrain Control Module PCM is an on-board electronic control unit that primarily controls the charging, emission and transmission systems of the vehicle. It works in conjunction with a network of sensors, using their inputs to control the functioning of the engine and powertrain. The PCM is a combination of the engine control unit (ECU) and the transmission control unit. The ECU controls aspects such as the variable valve timing, idle speed, ignition timing, fuel injection, and emission control.
The transmission control unit uses data from the ECU to decide when to change the gears for better efficiency and fuel economy. It also uses signals from vehicle speed sensor (VSS), wheel speed sensor (WSS) and the throttle position sensor (TPS) to determine the time of the gear change and the correct gear for the vehicle. The inputs from the kick-down switch and the brake-light switch to determine whether a downshift is needed in the transmission.
The PCM controls a wide range of functions in the car and generates a corresponding error code when there's a discrepancy in the normal functioning of the component. The mechanic can use this code to troubleshoot the performance of your vehicle. It also triggers the "Check Engine Light" on the dashboard to alert the driver of the problem. A failure in the PCM would cause most of the error lights on your dashboard flash now and then. Your vehicle may also fail to start or would stall while running. Another possible symptom is poor emissions due to failure to control the emissions system. In any case, if your PCM is malfunctioning, you should replace it at once. At Buy Auto Parts we stock a wide variety of powertrain control modules for every car make and model.
We have genuine OEM replacements and premium aftermarket parts. All our car parts are thoroughly tested and come with a warranty. To view the parts that fit your vehicle, select the right year, make and model of your car on our online catalog. At Buy Auto Parts you will find high-quality powertrain control modules at unbeatable prices, and free shipping. If you have any questions about our car parts, call our toll-free support line 1-888-907-7225 or email us at [email protected].