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DTC P2138 [L3]: Notes

DTC P2138 (L3) DETECTION CONDITION & POSSIBLE CAUSES

DTC P2138 Accelerator pedal position (APP) sensor No.1/No.2 voltage problem
DETECTION CONDITION 
  • The PCM compares the input voltage from APP sensor No.1 with the input voltage from APP sensor No.2/when the engine is running. If the difference is more than the specification, the PCM determines that then! is an APP sensor No.1/No.2 angle correlation problem.

Diagnostic support note 
  • This is a continuous monitor (CCM).
  • MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
  • FREEZE FRAME DATA is available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • APP sensor connector or terminal malfunction
  • APP sensor No.1 malfunction
  • APP sensor No.2 malfunction
  • PCM connector or terminal malfunction
  • PCM malfunction
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