Error code

OBD2 P2123

OBD2P2123
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle/Pedal Position Sensor/Switch 'D' Circuit High Input.

Severity

moderateCan drive but may experience reduced performance and safety issues. It's recommended to address the issue promptly.

Summary

Code P2123 indicates an abnormally high input voltage in the throttle control system's sensor or switch labeled 'D'. This issue is related to the accelerator pedal position (APP) or throttle position (TP) sensor/switch.

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors between sensors
  • Defective APP or TP sensor/switch 'D'
  • High system voltages due to charging system defects

Diagnosis

  1. Inspect wiring and connectors between sensors, throttle body, and PCM for damage or corrosion.
  2. Check system voltages for abnormalities.
  3. Test individual APP/TP sensor 'D' for proper operation.

Fixes

  • Replace faulty APP/TP sensor or switch 'D'.

FAQ

What does code P2123 mean?

Code P2123 indicates an abnormally high input voltage in the throttle control system's sensor/switch labeled 'D', which could be related to the accelerator pedal position or throttle position.

Where is the P2123 sensor located?

The sensor can be either on the accelerator pedal assembly or within the throttle body, depending on the vehicle's design.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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