Accelerator Pedal Position System
2000-2005 Chevrolet Impala 3.8L V6
Description
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
- Test APP sensor voltages at rest and full pedal
- Inspect APP sensor connector
- Check for floor mat interference
- Monitor APP readings with scan tool
- Compare APP sensor 1 and 2 readings
Repair Notes
Replace accelerator pedal position sensor assembly. Check for interference at pedal.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1125 on Other Vehicles
Chevrolet Astro
1995-2005 4.3L V6 Vortec
Chevrolet Avalanche
2002-2006 5.3L V8 Vortec
Chevrolet Avalanche
2002-2006 8.1L V8 Vortec
Chevrolet Avalanche
2007-2013 5.3L V8 Vortec
Chevrolet Avalanche
2007-2013 6.0L V8 Vortec
Chevrolet Aveo
2012-2018 1.6L I4
Chevrolet Beat
2018-2021 1.2L I4
Chevrolet Beretta
1990-1996 2.2L I4
Common Questions
What does code P1125 mean on a 2000-2005 Chevrolet Impala?
P1125 stands for "Accelerator Pedal Position System". The PCM detected a malfunction in the Accelerator Pedal Position (APP) system. The APP system includes multiple sensors that track driver throttle demand.
What are the symptoms of P1125 on a Chevrolet Impala?
Common symptoms of P1125 include: Check Engine Light, Reduced Engine Power mode, Loss of throttle response, Vehicle may not accelerate, Limp mode.
What causes P1125 on a 2000-2005 Chevrolet Impala?
Common causes of P1125 include: Faulty APP sensor assembly, Damaged wiring to APP sensor, Corroded APP connector, Floor mat interfering with pedal, APP sensor out of calibration.