P24F8
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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open or shorted control wireCommon
- Failed driver stage in the dosing modulePossible
Parts involved
- Aftertreatment Purge Valve
- Solenoid Driver
- Wiring Harness
P24F8 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.