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2018 RAM 3500
6.7L I6 Cummins•RWD•diesel•ISB•turbo
11 active safety recalls on this vehicle — view recalls
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Repairs0Labor515Torque136Fluid9DTC1795Battery1Maintenance0Recalls11
P0787moderate severityPowertrain

Shift/Timing Solenoid Low

on 2018 Ram 3500 6.7L I6 Cummins · RWD

What this code means

The shift or timing solenoid circuit voltage is reading lower than expected. This often indicates a short to ground or wiring fault.

Symptoms

  • Erratic shifting
  • No shift in certain gears
  • Check engine light on

Common causes

  • Short to ground in wiring
  • Failed solenoid
  • Poor connector contact
  • Faulty valve body

Diagnostic steps

  1. Inspect wiring for shorts to ground
  2. Scan for related codes
  3. Measure solenoid circuit voltage and resistance
  4. Test valve body operation
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