981 · Engine

P2138

Throttle/Pedal Position Sensor "D"/"E" Voltage Correlation

HIGH SEVERITY

The two accelerator pedal position sensor signals disagree.

SYMPTOMS

  • Check-engine light
  • Reduced power / limp mode
  • Erratic response

LIKELY CAUSES

  • Faulty pedal position sensor
  • Wiring fault
  • Connector fault

DIAGNOSIS STEPS

  • Compare both pedal signals in live data
  • Check wiring and connector
  • Replace the pedal sensor

RELATED PARTS

  • Accelerator pedal sensor
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