P0380
Glow Plug/Heater Circuit A
P0380 is an OBD-II diagnostic trouble code meaning: Glow Plug/Heater Circuit A. Common causes: glow plug malfunction, open or short circuit in the glow plug circuit. Estimated repair cost: $33–167.
Symptoms
- Difficulty starting the engine, especially in cold weather
- Unstable operation at idle
- Increased noise level during cold start
- Increased white smoke emissions at startup
- Check Engine Light Illuminates
Causes
- Glow plug malfunction
- Open or short circuit in the glow plug circuit
- Faulty glow plug relay
- Problems with the engine control unit (ECU)
- Blown glow plug circuit fuse
How to Fix
- Diagnostics of the glow plug circuit: checking the resistance of each plug and the integrity of the circuit
- Checking the operation of the glow plug relay and fuses
- Visual inspection of wiring for damage and corrosion
- Replacing faulty glow plugs
- Repair or replace damaged wiring
- Resetting the error code and re-diagnosis
Related codes
Error P0380 by Vehicle Brand
FAQ
What does the P0380 code mean?
P0380 is an OBD-II diagnostic trouble code that indicates: Glow Plug/Heater Circuit A
What causes a P0380 error code?
The most common causes of P0380 include: Glow plug malfunction; Open or short circuit in the glow plug circuit; Faulty glow plug relay; Problems with the engine control unit (ECU).
How do I fix a P0380 diagnostic trouble code?
To fix P0380: Diagnostics of the glow plug circuit: checking the resistance of each plug and the integrity of the circuit. Checking the operation of the glow plug relay and fuses. Visual inspection of wiring for damage and corrosion. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0380?
Limited driving only, diagnose soon
How much does it cost to fix P0380?
The estimated repair cost for P0380 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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