F 450 4WD Super Duty V8-6.0L DSL Turbo VIN P (2003)
Accelerator Pedal Position Sensor: Description and Operation
Accelerator Pedal Position (App) Sensor
Accelerator Pedal Position (APP) Sensor
The accelerator pedal position (APP) sensor is a three-track potentiometer that is used to calculate fuel quantity. The sensor receives VREF voltage
from the powertrain control module (PCM) and provides a variable voltage signal directly proportional to the accelerator pedal position. A PCM
detected fault of one of the three sensor track signals will illuminate the malfunction indicator (MIL) and permit normal operation. A fault with two
sensor signals will illuminate the MIL and only allow the engine to operate at idle.
