Powertrain
generic / SAE
P0380
Glow Plug/Heater Circuit "A" Malfunction
The glow plug control module reports an electrical fault on circuit A — typically a single glow plug open-circuit, the relay failing, or wiring to the harness damaged. Diesel-specific; affects cold-start behaviour.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 80
Possible causes
- One or more glow plugs open-circuit high
- Glow plug relay failed medium
- Wiring/harness damage low
Symptoms
- Glow plug warning light on (often orange coil symbol)
- Hard cold start or no start in cold weather
- White smoke from exhaust during warm-up
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–500 €
- Estimated time: 0.5–3 h
- Component: glow plug
- Component: glow plug relay
- Component: glow plug control module
- MIL / check engine light
Sources
References
sae:J2012