Exhaust Aftertreatment Fuel Supply Control Performance
Aftertreatment fuel supply is electrically OK but does not deliver the commanded pressure or flow during regeneration — weak pump or partial blockage.
Affected components
- Aftertreatment fuel pump
Common causes
- High likelihood: Pump weak — flow or pressure below threshold
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.