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2013 BUICK ENCLAVE
3.6L V6•AWD•AUTOMATIC•gas
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor483Torque2146Fluid10DTC1234Battery1Maintenance0Recalls4
P1125high severityPowertrain

Accelerator Pedal Position System

on 2013 Buick Enclave 3.6L V6 · AWD

What this code means

The PCM detected a malfunction in the Accelerator Pedal Position (APP) system. The APP system includes multiple sensors that track driver throttle demand.

Symptoms

  • Check Engine Light
  • Reduced Engine Power mode
  • Loss of throttle response
  • Vehicle may not accelerate
  • Limp mode

Common causes

  • Faulty APP sensor assembly
  • Damaged wiring to APP sensor
  • Corroded APP connector
  • Floor mat interfering with pedal
  • APP sensor out of calibration

Diagnostic steps

  1. Test APP sensor voltages at rest and full pedal
  2. Inspect APP sensor connector
  3. Check for floor mat interference
  4. Monitor APP readings with scan tool
  5. Compare APP sensor 1 and 2 readings

Repair notes

Replace accelerator pedal position sensor assembly. Check for interference at pedal.

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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