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.
Affected components
- Glow plug
- Glow plug wiring
Common causes
- High likelihood: Glow plug element open
Possible 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
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.