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2013 RAM 2500
6.7L I6 Cummins Diesel•4WD•AUTOMATIC•diesel•turbo
16 active safety recalls on this vehicle — view recalls
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Repairs0Labor519Torque3583Fluid10DTC1035Battery1Maintenance0Recalls16
P3870moderate severityPowertrain

Electronic EGR Cooler Bypass Valve Stuck

on 2013 Ram 2500 6.7L I6 Cummins Diesel · 4WD

What this code means

The electronic EGR cooler bypass valve that routes exhaust gas around or through the EGR cooler is stuck.

Symptoms

  • Check Engine Light
  • EGR gas temperature incorrect
  • Higher NOx emissions
  • Reduced engine performance
  • EGR cooler may overheat or underperform
  • Intake manifold carbon buildup changes

Common causes

  • Carbon buildup on valve
  • Actuator motor failure
  • Valve mechanism corroded
  • Wiring fault
  • Exhaust condensation causing corrosion

Diagnostic steps

  1. Command EGR cooler bypass valve via scan tool
  2. Monitor EGR gas temperature upstream and downstream of cooler
  3. Inspect valve actuator operation
  4. Test valve position sensor
  5. Check for carbon deposits on valve

Repair notes

Replace EGR cooler bypass valve. Clean carbon deposits from EGR passages. Inspect EGR cooler for leaks.

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