Glow Plug/Heater Circuit "A"
The POWERSTROKE-P0380 (Power Stroke) diesel fault code means: Glow Plug/Heater Circuit "A". This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
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What Are the Symptoms of POWERSTROKE-P0380?
- Check Engine Light on
- Hard starting when cold
- White smoke after a cold start
What Causes POWERSTROKE-P0380? (Most Likely First)
- Failed glow plug relay or controller High
- Damaged wiring or connector in the glow plug circuit High
- Failed glow plugs Moderate
Can I Still Drive with POWERSTROKE-P0380?
Yes, but fix soon. POWERSTROKE-P0380 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.
Common Fixes by Vehicle
What techs usually find when diagnosing POWERSTROKE-P0380 on specific platforms — tap a platform for the fix and the exact part:
1999-2003 Ford F-250/F-350 7.3L & 2003-2007 6.0L Advanced DIY
Glow plug circuit malfunction. On 7.3L, pull the GPR (glow plug relay) on the driver valve cover and verify 12V out when commanded; if no output, replace relay. On 6.0L, the UVCH (under-valve-cover harness) often burns through and shorts - pull the valve cover to inspect.
Labor: 2.0-4.0 hrsFrequently Asked Questions
What does P0380 mean on a Power Stroke?
P0380 means Glow Plug/Heater Circuit "A". The engine computer has detected a fault in the glow plug or heater circuit "A".
Is P0380 a Power Stroke-specific code?
No. P0380 is a generic OBD-II code defined by SAE J2012, so it means the same thing on any vehicle that sets it. The exact conditions Ford uses to set it on its diesels are in Ford service information.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose POWERSTROKE-P0380?
Command the glow plugs with a scan tool and check for voltage at the plugs.
Check the relay or controller and its power supply.
Measure the glow plug resistances.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0380 as a generic OBD-II code)
P0380 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
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