P24F9
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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Aged solenoid with weakened magnetic forceCommon
- Coked armature with increased frictionPossible
- Sensor element aged beyond calibration windowLess likely
Parts involved
- Aftertreatment Purge Valve
P24F9 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.