P0384: Glow Plug Control Module 1 Control Circuit High
What to do
Expect hard cold starting. Same repair consideration as P0383 — controller rather than plugs.
What this code means
The glow plug controller command circuit is reading high — a short to supply, or an open circuit. Completes the five glow plug codes spanning P0380–P0384.
Likely causes
Start here
- Open circuit in glow plug wiring · moderate
- Wiring shorted to voltage · moderate
- Failed glow plug control module · moderate
Less common
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
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Community experience
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