P04AB
EVAP System Purge Control Valve B Circuit/Open
Generic OBD-II
Common symptoms
What you'll notice
- Check the purge control valve for any physical damage or clogging
- Inspect the wiring and connectors of the purge control valve for loose or damaged connections
- Test the purge control valve using a multimeter to ensure it is functioning properly
- Check the EVAP system for any leaks or blockages
Common causes
Most likely first
- Faulty EVAP system purge control valve
- Loose or damaged connection in the EVAP system purge control valve circuit
- Blocked or restricted EVAP system purge control valve
- Faulty EVAP canister purge solenoid
- Malfunctioning EVAP system pressure sensor
How to diagnose & fix
Work through it in order
- Check engine light illuminated on the dashboard
- Difficulty starting the vehicle
- Decreased fuel efficiency
- Irregular idling or stalling of the engine
- Strong smell of fuel in the vehicle's cabin
Read & clear P04AB yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.