P0123 Throttle/Pedal Position Sensor/Switch "A" Circuit High
Throttle position sensor A signal is too high.
Common causes
- Short to voltage
- Open ground
- Faulty sensor
Symptoms
- Check engine light
- Limp mode
- High idle
What to check
- Check ground circuit
- Inspect wiring
- Replace sensor if faulty
Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0123, follow the service information for that make and model.
Related codes
- P0120 Throttle/Pedal Position Sensor/Switch "A" Circuit
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