P2122critical severityPowertrain

Throttle/Pedal Position Sensor/Switch D Circuit Low

on 2001 Dodge Ram Van 3.9L V6 · 4WD

What this code means

Low voltage from accelerator pedal position sensor D.

Symptoms

  • Limp mode
  • Engine at idle
  • Check engine light

Common causes

  • Failed APP sensor
  • Short to ground in wiring
  • Corroded connector

Diagnostic steps

  1. Measure voltage at APP sensor D
  2. Check wiring
  3. Swap sensor if dual-assembly

Repair notes

Replace accelerator pedal assembly or repair wiring.

Other Powertrain codes on this vehicle

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