P2123
Throttle/Pedal Position Sensor/Switch D Circuit High
P2123 is an OBD-II diagnostic trouble code meaning: Throttle/Pedal Position Sensor/Switch D Circuit High. Common causes: short circuit in the sensor circuit to positive, malfunction of the throttle or pedal position sensor. Estimated repair cost: $17–56.
Symptoms
- Check Engine Light Is On
- The engine goes into emergency mode
- Unstable engine operation
- Acceleration problems
- Increased fuel consumption
Causes
- Short circuit in the sensor circuit to positive
- Malfunction of the throttle or pedal position sensor
- Wiring harness damage
- Poor contact in connectors
- Engine control unit malfunction
How to Fix
- Check the voltage in the sensor circuit
- Inspect the wiring harness for damage
- Check sensor and ECU connectors
- Replace throttle/pedal position sensor if necessary
- Test or replace the control unit if it is suspected of being faulty
Related codes
Error P2123 by Vehicle Brand
FAQ
What does the P2123 code mean?
P2123 is an OBD-II diagnostic trouble code that indicates: Throttle/Pedal Position Sensor/Switch D Circuit High
What causes a P2123 error code?
The most common causes of P2123 include: Short circuit in the sensor circuit to positive; Malfunction of the throttle or pedal position sensor; Wiring harness damage; Poor contact in connectors.
How do I fix a P2123 diagnostic trouble code?
To fix P2123: Check the voltage in the sensor circuit. Inspect the wiring harness for damage. Check sensor and ECU connectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2123?
Limited driving only, diagnose soon
How much does it cost to fix P2123?
The estimated repair cost for P2123 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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