Accelerator Pedal Position (APP) Sensor
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
The APP sensor is an input to the powertrain control module (PCM) and determines the amount of torque requested by the operator. Depending on the application, either a 2 track or 3 track APP sensor is used.