Exhaust Aftertreatment Fuel Injector A Performance
The 7th injector responds to commands but does not deliver expected fuel during regeneration. Coking on the nozzle or worn pressure regulation reduces flow.
Affected components
- Hc dosing injector
- High pressure pump
Common causes
- High likelihood: Coked nozzle restricts fuel delivery
- Medium likelihood: Fuel pressure to the dosing line out of tolerance
Possible symptoms
- Check engine light on
- Misfire or rough idle on the affected cylinder
- Increased fuel consumption
- Possible fuel smell or smoke from exhaust
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.