Error code

OBD2 P2122

OBD2P2122
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 Low Input.

Severity

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

Summary

Code P2122 indicates a low input voltage issue with the throttle/accelerator pedal position sensor or switch labeled 'D'. This sensor is part of the drive-by-wire system that controls engine throttle.

Common Causes

  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors between sensors
  • Defective accelerator pedal position sensor or switch
  • Throttle plate position sensor failure
  • Abnormally low system voltages due to charging system issues

Diagnosis

  1. Inspect wiring and connectors for damage or corrosion between sensors and PCM.
  2. Check system voltage levels, especially from the charging system.
  3. Test individual throttle/accelerator pedal position sensors for functionality.

Fixes

  • Replace faulty accelerator pedal assembly if sensor is integrated into it.
  • Install a new throttle body if the throttle plate position sensor is defective and integrated within.

FAQ

What does P2122 mean?

P2122 indicates an abnormally low input voltage from the accelerator pedal or throttle position sensor labeled 'D'.

How serious is code P2122?

Moderately serious. It can affect engine performance and safety, but driving may still be possible.

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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