OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P24F7?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyStuck closed by deposits or seized armature
- PossibleOpen coil — valve never opens
- Less likelyCarbon or debris buildup preventing free movement
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.6–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Aftertreatment Purge Valve, Dosing Line
Related codes
- P24F6Exhaust Aftertreatment Fuel Air Purge Valve Stuck Open
- P24F4NOx Sensor Delayed Response - High to Low Bank 1 Sensor 1
- P24F5NOx Sensor Delayed Response - High to Low Bank 1 Sensor 2
- P24F8Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit
- P24F9Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Range/Performance
- P24FAExhaust Aftertreatment Fuel Air Purge Valve Control Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.