Engine Error
P2138
Accelerator Pedal Position (APP) Sensor 1/2 Voltage Correlation
Severity
High
Symptoms
Reduced engine power, erratic throttle behavior, limp mode
Common Causes
- Defective APP sensor
- Wet or corroded floor harness
- Damaged pedal wiring
- Faulty PCM
How to Fix
- 1 Replace pedal assembly
- 2 Dry out floor wiring harness
- 3 Clean APP sensor connector
- 4 Test pedal sensor voltages
Estimated Repair Cost
USD
$200
–
$500
Pedal sensor/assembly: $200 - $500