Cylinder 12 Glow Plug Incorrect
The glow plug on cylinder 12 reports an electrical resistance or response curve that does not match the calibrated plug type. Typical after fitting a wrong replacement plug.
Affected components
- Glow plug cyl 12
Common causes
- High likelihood: Replacement plug of wrong type
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.