P0380Medium urgency
Glow Plug/Heater Circuit A Malfunction
Engine · Diesel Cold Start
⚠️ Fix before cold weather — hard starts in cold temperatures.
What this means
A glow plug or its circuit has failed on a diesel engine.
Likely causes
- Failed glow plug(s)Most common
- Blown glow plug fuseCommon
- Failed glow plug relayCommon
Estimated repair cost
Glow plug replacement (per plug)$20 – $60
All glow plugs (set of 4)$100 – $300
Glow plug relay$30 – $100
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Frequently asked questions about P0380
What does P0380 mean?
A glow plug or its circuit has failed on a diesel engine.
Is P0380 serious?
Fix before cold weather — hard starts in cold temperatures.
How much does it cost to fix P0380?
Repair costs for P0380 range from $20 – $60 depending on the root cause and your vehicle.
Can I drive with P0380?
You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.