Exhaust Aftertreatment Fuel Supply Control Circuit/Open
The control circuit for the dedicated aftertreatment fuel supply pump or solenoid is open — HC dosing into the exhaust will fail.
Affected components
- Aftertreatment fuel pump
- Aftertreatment fuel supply solenoid
Common causes
- High likelihood: Winding or coil open
- Low likelihood: Pin pushed back out of connector body
- Low likelihood: Cracked solder joint inside the module or sensor
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.