DTC P0121: Accelerator Pedal Position Sensor 1 Circuit Performance: Notes

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2000 GMC Savana Special, 2000 GMC Savana Camper Special, 2000 GMC Savana, 2000 GMC Pickup, and 2000 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: For circuit reference, refer to schematic. See Fig 1.

Fig 1: Accelerator Pedal Position (APP) System Circuit Diagram

Courtesy of GENERAL MOTORS CORP.