OBD-II code · Powertrain (generic, extended)
P24FB Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit High
The control circuit of the aftertreatment purge valve reads stuck high — typically a short to battery voltage or an open ground/return path. The driver cannot pull the line low to actuate the valve.
Is it safe to drive with P24FB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl wire shorted to battery voltage
- PossibleOpen ground or open coil
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- Parts involved
- Aftertreatment Purge Valve, Solenoid Driver
Related codes
- P24F8Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit
- P24FAExhaust Aftertreatment Fuel Air Purge Valve Control Circuit Low
- P24F9Exhaust Aftertreatment Fuel Air Purge Valve Control Circuit Range/Performance
- P24FCParticulate Matter Sensor Heater Control Circuit Driver Current/Temperature Too High
- P24FDParticulate Filter A Incorrect
- P24FESCR Catalyst Incorrect
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.