P0380
Glow Plug/Heater Circuit A
2013-2018 Ram 2500 6.7L I6 Cummins Diesel
Moderate SeverityPowertrainGeneric (SAE)
Description
Malfunction in the glow plug heating circuit. Glow plugs are used in diesel engines to preheat the combustion chamber for cold starting.
Symptoms
- Check Engine Light
- Hard cold starting
- White smoke on cold start
- Extended cranking
- Rough idle when cold
Common Causes
- Faulty glow plug(s)
- Glow plug relay failure
- Glow plug module failure
- Wiring damage
- Blown fuse
Diagnostic Steps
- Test individual glow plug resistance (typically 0.5-2 ohms)
- Check glow plug relay
- Test glow plug module
- Check fuse
- Inspect wiring
Repair Notes
Test each glow plug individually. Replace any with open circuit or high resistance. Check relay/module.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P0380 on Other Vehicles
Common Questions
What does code P0380 mean on a 2013-2018 Ram 2500?
P0380 stands for "Glow Plug/Heater Circuit A". Malfunction in the glow plug heating circuit. Glow plugs are used in diesel engines to preheat the combustion chamber for cold starting.
What are the symptoms of P0380 on a Ram 2500?
Common symptoms of P0380 include: Check Engine Light, Hard cold starting, White smoke on cold start, Extended cranking, Rough idle when cold.
What causes P0380 on a 2013-2018 Ram 2500?
Common causes of P0380 include: Faulty glow plug(s), Glow plug relay failure, Glow plug module failure, Wiring damage, Blown fuse.