OBD-II code · Powertrain (generic, extended)
P24DE Reductant Purge Control Valve B Circuit High
Same as P24DB with the control line shorted to supply. 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 P24DE?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyControl line shorted to supply
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- P20A3Reductant Purge Control Valve A Circuit High
- P24DBReductant Purge Control Valve B Circuit Open
- P24DCReductant Purge Control Valve B Performance
- P24DDReductant Purge Control Valve B Circuit Low
- P24DFReductant Purge Control Valve B Stuck Open
- P24E0Reductant Purge Control Valve B Stuck Closed
- P24E1NH3 Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.