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5.9L I6 Cummins4WDdieselISBturbo
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P2109high severityPowertrain

Throttle/Pedal Position Sensor A Minimum Stop Performance

on 2005 Ram 3500 5.9L I6 Cummins · 4WD

What this code means

The throttle position sensor is not reading the expected minimum (closed) stop value. This indicates a mechanical or electrical issue with the throttle body sensor A range.

Symptoms

  • Check engine light on
  • Erratic or high idle
  • Reduced power / limp mode

Common causes

  • Dirty or carbon-fouled throttle body
  • Faulty throttle position sensor A
  • Wiring or connector fault
  • Mechanical throttle blade binding

Diagnostic steps

  1. Scan code and view TPS live data
  2. Clean throttle body and recheck
  3. Inspect TPS wiring and connectors
  4. Perform throttle relearn or replace sensor

Other Powertrain codes on this vehicle

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