Powertrain
generic / SAE
P0676
Cylinder 6 Glow Plug Circuit
An electrical fault is present in the glow plug circuit for cylinder 6. The glow plug control module cannot drive this plug correctly — open circuit, short, or out-of-range resistance — so cylinder 6 is not pre-heated. On a cold start this causes hard starting, white smoke, and a misfire-like rough run until the engine warms. Causes: a failed glow plug, a broken supply lead to that plug, corrosion at the plug connector, or a faulty module output for cylinder 6.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number6 / 76
Possible causes
- Glow plug element open high
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: shop recommended
- Estimated cost: 60–400 €
- Estimated time: 0.5–2 h
- Component: glow plug
- Component: glow plug wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012