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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
P1596moderate severityPowertrain

Speed Control Switch Always High

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

What this code means

The PCM detected the speed control switch signal is stuck in a high voltage state. This is a Chrysler-specific code with no direct OBD-II generic equivalent.

Symptoms

  • Cruise control inoperative
  • Check engine light on
  • Cruise engages unexpectedly

Common causes

  • Stuck speed control switch
  • Wiring shorted to voltage
  • Bad connector
  • Faulty PCM

Diagnostic steps

  1. Scan for stored codes
  2. Test speed control switch voltages
  3. Inspect wiring for short to power
  4. Check connector integrity
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Other Powertrain codes on this vehicle

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🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
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