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2014 RAM 2500
6.7L I6 Cummins Diesel•4WD•AUTOMATIC•diesel•turbo
16 active safety recalls on this vehicle — view recalls🏆Sponsored by Anonymous Sponsor
Repairs436Labor519Torque3583Fluid10DTC1737Battery1Maintenance0Recalls16
P0804low severityPowertrain

1-4 Upshift (Skip Shift) Lamp Control Circuit

on 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD

What this code means

A fault has been detected in the 1-4 upshift (skip shift) lamp control circuit on the instrument cluster. The warning lamp may not illuminate correctly to indicate skip shift operation.

Symptoms

  • Skip shift lamp inoperative or stays on
  • Check engine light on
  • No shift indication to driver

Common causes

  • Burned out skip shift indicator bulb
  • Open or short in lamp circuit wiring
  • Faulty instrument cluster
  • Faulty PCM output driver

Diagnostic steps

  1. Scan for stored codes
  2. Inspect lamp circuit wiring and connectors
  3. Test indicator bulb or LED operation
  4. Verify PCM command and cluster function
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