P1271 BUICK Possible Causes
- Faulty accelerator pedal position (APP) sensor
- Accelerator pedal position harness is open or shorted
- Poor electrical connection in the accelerator pedal position circuit
How is the P1271 BUICK code repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
When is the code detected?
The Engine Control Module (ECM) compared the signal from the two accelerator pedal position (APP) sensors and detected a voltage difference.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P1271 BUICK 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.