OBD-II code · Powertrain (generic)
P04AE EVAP System Purge Control Valve B Performance Stuck Open
EVAP System Purge Control Valve B Performance Stuck Open: the component is electrically intact but its response does not match the command.
Is it safe to drive with P04AE?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyDebris on valve seat prevents full closing
- PossibleReturn spring weakened
- Less likelyCarbon or debris buildup preventing free movement
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–1.5 h
- Emissions test
- Likely to fail
- Parts involved
- Evap Purge Valve B
Related codes
- P04DFEVAP System Purge Control Valve A Performance Stuck Open
- P04ABEVAP System Purge Control Valve B Circuit Open
- P04ACEVAP System Purge Control Valve B Circuit Low
- P04ADEVAP System Purge Control Valve B Circuit High
- P04AFEVAP System Purge Control Valve B Stuck Closed
- P04B0Refueling Vapor Control Valve Circuit Open
- P04B1Refueling Vapor Control Valve Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.