Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Range/Performance
The valve coil is electrically intact, but the response (current rise time, return-current decay, position feedback) does not match the ECM model. Typical for solenoids losing magnetic strength after long thermal cycling, or armatures with increased friction from coking.
Affected components
- Aftertreatment purge valve
Common causes
- High likelihood: Aged solenoid with weakened magnetic force
- Medium likelihood: Coked armature with increased friction
- Low likelihood: Sensor element aged beyond calibration window
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.