P0381low severityPowertrain
Glow Plug/Heater Indicator Circuit
on 2014 Ram 2500 6.7L I6 Cummins Diesel · 4WD
What this code means
Malfunction in the glow plug indicator (dashboard wait-to-start light) circuit.
Symptoms
- Wait-to-start light not working
- No glow plug indication
- Light stays on too long
Common causes
- Burnt out indicator bulb
- Wiring issue
- Glow plug module fault
- Instrument cluster issue
Diagnostic steps
- Test indicator bulb
- Check wiring
- Test glow plug module output
Repair notes
Replace bulb or repair wiring.
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