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
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References
sae:J2012