P0123
PowertrainThrottle Pedalcritical severityThrottle/Pedal Position Sensor/Switch A Circuit High Input
What P0123 Means
The TPS voltage is above the maximum threshold.
Symptoms
- Check Engine Light
- Limp mode
- High idle
- Sudden acceleration concern
Common Causes
- Open circuit in TPS ground
- Short to voltage
- Faulty TPS
Diagnostic Steps
- Test TPS voltage
- Check for open ground
- Check for shorts to power
Where to start: Repair wiring or replace TPS. Safety concern - do not drive.
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