Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit
General electrical fault in the control circuit of the aftertreatment fuel/air purge valve. The ECM cannot drive the valve coil according to plausibility checks — open, short or unexpected feedback voltage. Until cleared, dosing line purge is suspended.
Affected components
- Aftertreatment purge valve
- Solenoid driver
- Wiring harness
Common causes
- High likelihood: Open or shorted control wire
- Medium likelihood: Failed driver stage in the dosing module
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.