Glow Plug Control Driver Performance
The glow plug control driver does not respond to commands within tolerance. Cold-start glow function is degraded so cold starting can be delayed and white smoke increases.
Affected components
- Glow plug controller
- Control module
Common causes
- High likelihood: Aged driver shows degraded switching behaviour
- Medium likelihood: Current feedback loop noisy
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
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.