Error code

OBD2 P2109

OBD2P2109
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Throttle/Pedal Position Sensor 'A' Minimum Stop Performance.

Severity

moderateCan drive but may experience poor engine performance and rough idling.

Summary

P2109 indicates an issue with the throttle/accelerator pedal position sensor A's minimum stop performance, meaning it fails to report correct idle position data to the PCM.

Symptoms

  • Engine idling rough or not at expected RPM
  • Check engine light illuminated

Common Causes

  • Defective Accelerator Pedal Position (APP) / Throttle Position (TP) sensor A
  • Worn mechanical linkage between pedal and sensor
  • Corroded, damaged wiring or connectors in the throttle control system

Diagnosis

  1. Inspect and test sensor A for proper operation
  2. Check wiring and connectors for damage or corrosion

Fixes

  • Replace defective Accelerator Pedal Position (APP) / Throttle Position (TP) sensor A

FAQ

What does P2109 mean?

P2109 indicates a malfunction in the throttle/accelerator pedal position sensor A, specifically at idle position.

How do I fix P2109?

Fixing P2109 typically involves replacing the faulty APP/TP sensor A or repairing damaged wiring/connectors.

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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