P0380 on Ford: How to Diagnose & Fix
Glow Plug/Heater Circuit A Malfunction
1 Ford model · 1 documented issue · $200-$800 repair
P0380 on Ford by model: symptoms, diagnosis and fix
Glow plug failure is common on 7.3L diesel engines, causing hard cold starts. The glow plug relay (solenoid) also fails, preventing power from reaching functional glow plugs. Broken glow plug tips can also fall into the cylinder.
Common Symptoms
- Hard starting in cold weather
- Extended cranking
- Wait-to-start light stays on
- White smoke on cold start
How to Fix
Sources for this issue (1)
P0380 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0380 mean on a Ford?
P0380 stands for "Glow Plug/Heater Circuit A Malfunction." P0380 applies to diesel engines and means the computer detected a malfunction in glow plug heater circuit 'A'. Glow plugs preheat the combustion chambers to help a cold diesel start, and the control module monitors the glow plug circuit (often through a relay/control module); when the current or voltage isn't what it expects, it sets this code. The most noticeable symptom is hard cold starting, rough running until warm, or extra white smoke at startup. It indicates an electrical fault in the glow plug system rather than a fuel-injection problem. On Ford it is documented across 1 model: F-250.
What are the most common causes of P0380?
The most common causes of P0380 are: One or more failed glow plugs, Faulty glow plug control module or relay, Corroded or loose glow plug wiring/connectors, Open or shorted glow plug circuit wiring, Blown glow plug fuse, Poor power feed or ground to the glow plug circuit, Failed driver in the engine control module. The specific cause varies by vehicle.
How much does it cost to fix P0380 on a Ford?
Published repair estimates on Ford range from $200 to $800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0380 on a different make?
View P0380 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.