Exhaust Aftertreatment Glow Plug Performance
The aftertreatment glow plug heats but exhaust temperature does not rise as expected. Combustion of injected HC may not start.
Affected components
- Aftertreatment glow plug
- Exhaust temperature sensor
Common causes
- High likelihood: Aged glow plug heats slowly or unevenly
- Medium likelihood: HC supply from 7th injector below required
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
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.