P1270 GMC Possible Causes
- Faulty Accelerator Pedal Position (APP)
- Accelerator Pedal Position Harness is Open or Shorted
- Poor Electrical Connection in the Accelerator Pedal Position Circuit
How is GMC Code P1270 Repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine Light On (or Service Engine Soon Warning Light)
P1270 GMC Meaning
The Accelerator Pedal Position (APP) sensors are located in the Throttle Actuator Control (TAC) module assembly. The TAC module assembly is mounted on the accelerator pedal bracket. There are 3 individual APP sensors in the TAC module. Three separate signal circuits, low reference circuits, and 5-volt reference circuits are used to determine the accelerator pedal position. The APP sensor signal voltages increase when the accelerator pedal is pressed.