Powertrain
generic / SAE
P0123
Throttle/Pedal Position Sensor "A" High Input
The TPS signal voltage exceeds the upper acceptable threshold. As with P0122, limp-home mode is typical until the fault clears.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 23
Possible causes
- Signal wire shorted to supply voltage high
- Sensor ground broken medium
- TPS internally failed low
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–400 €
- Estimated time: 0.5–2.5 h
- Component: throttle position sensor
- Component: throttle position sensor wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
- limp mode possible
Sources
References
sae:J2012