P1123
Throttle Position Sensor Circuit Intermittent High Voltage
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Unstable engine idling
- Dips during acceleration
- Increased fuel consumption
- Check Engine Light Is On
- Reduced engine power
Causes
- Throttle Position Sensor Malfunction
- Open or short circuit in the sensor circuit
- Oxidation of contacts in connectors
- Circuit Grounding Problems
- Malfunction of the engine control unit (rare)
How to Fix
- Check the condition of the sensor connectors and wiring
- Clean contacts from oxides
- Check the sensor resistance (compare with standards)
- Replace the throttle position sensor if necessary
- Check and restore the integrity of the power circuit and signal wire