OBD-II code · Powertrain (generic, extended)
P24DC Reductant Purge Control Valve B Performance
Same as P24DB with the actuator electrically intact yet not delivering the commanded purge flow. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
Is it safe to drive with P24DC?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPurge valve sticking
Symptoms
- Check engine light or NOx warning on
- AdBlue/DEF level or quality warning
- Possible no-start countdown after ignore period
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–2 h
- Emissions test
- Likely to fail
- Parts involved
- Reductant Purge Valve B
Related codes
- P20A1Reductant Purge Control Valve A Performance
- P24D9EVAP System Pressure Sensor or Switch B Circuit Intermittent
- P24DAParticulate Matter Sensor Exhaust Sample Error Bank 1
- P24DBReductant Purge Control Valve B Circuit Open
- P24DDReductant Purge Control Valve B Circuit Low
- P24DEReductant Purge Control Valve B Circuit High
- P24DFReductant Purge Control Valve B Stuck Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.