Powertrain
generic / SAE
P24F7
Exhaust Aftertreatment Fuel Air Purge Valve Stuck Closed
The aftertreatment HC dosing or reductant purge valve is stuck closed. The ECM commands purge but the line is not cleared, leaving residual fluid that can foul nozzles or freeze in cold weather. Subsequent dosing events also fail because backpressure does not match the model.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / F7
Possible causes
- Stuck closed by deposits or seized armature high
- Open coil — valve never opens medium
- Carbon or debris buildup preventing free movement low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 200–900 €
- Estimated time: 0.6–2.5 h
- Component: aftertreatment purge valve
- Component: dosing line
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012