Owners of 2009-10 Jeep Compass and Patriot models with 2.4-liter engines and automatic transmissions may complain of a bump or jerk from the transmission under certain driving conditions.

On investigation, you'll probably find the check-engine light off and no trouble codes stored. Ford Motor Co. attributes all these issues to software issues in the PCM. Reprogramming the module with ...

The power control module, aka PCM, manages the engine, transmission and other systems based on information it receives from various sensors around the vehicle.