Exhaust Aftertreatment Fuel Supply Control Stuck Closed
Aftertreatment fuel supply solenoid stuck closed — HC dosing into exhaust fails, regeneration cannot raise temperature.
Affected components
- Aftertreatment fuel supply solenoid
Common causes
- High likelihood: Solenoid stuck closed
- Low likelihood: Carbon or debris buildup preventing free movement
- Low likelihood: Component wear with age - mechanical play
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.