P0122
PowertrainThrottle Pedalhigh severityThrottle/Pedal Position Sensor/Switch A Circuit Low Input
What P0122 Means
The TPS voltage is below the minimum threshold.
Symptoms
- Check Engine Light
- Limp mode
- Engine stuck at idle
- No throttle response
Common Causes
- Short to ground in TPS circuit
- Faulty TPS
- Damaged wiring
- Failed reference voltage
Diagnostic Steps
- Test TPS voltage
- Check for shorts to ground
- Test 5V reference
- Inspect wiring
Where to start: Repair short or replace TPS.
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