GM Repair Questions? Ask a Mechanic for Answers ASAP
Hello & Welcome,
The accelerator pedal position (APP) sensors 1 and 2 are located within the accelerator pedal assembly. Each sensor has the following circuits:
This provides the powertrain control module (PCM) with a signal voltage proportional to accelerator pedal movement. The APP sensor 1 signal voltage at rest position is near the low reference and increases as the pedal is actuated. The APP sensor 2 signal voltage at rest position is near the 5-volt reference and decreases as the pedal is actuated.
This problem is usually caused by a open or shorted in the accelerator pedal position sensor harness or the APP sensor itself.I suggest testing the wiring from t the sensor to the throttle body before replacing the APP sensor.
Accelerator Pedal Position Sensor Replacement
Notice: Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.
Important: If the vehicle is equipped with adjustable pedals,Disconnect the accelerator pedal position (APP) sensor electrical connector.
Tighten Tighten the bolts to 20 N·m (15 lb ft).