Engine Error
P2123
Throttle/Pedal Position Sensor/Switch D Circuit High Input
Severity
High
Symptoms
Vehicle forced into limp mode, erratic idle
Common Causes
- Short to voltage in APP sensor circuit
- Broken ground wire for pedal sensor
- Defective accelerator pedal
- Bad PCM
How to Fix
- 1 Trace and repair short to power
- 2 Repair broken ground connection
- 3 Replace accelerator pedal
- 4 Replace PCM
Estimated Repair Cost
USD
$100
–
$400
Pedal replacement: $150 - $350