EVAP System Purge Control Valve B Performance/Stuck Open

Common symptoms

What you'll notice

• Check for loose or damaged vacuum hoses in the EVAP system and repair or replace as necessary.
• Inspect and clean the EVAP canister purge valve to ensure it is not stuck in the open position.
• Test and replace the EVAP system purge control valve if it is found to be faulty or not functioning properly.
• Perform a smoke test to detect any leaks in the EVAP system and repair them accordingly.
• Inspect the EVAP system for any potential issues with the charcoal canister and replace if necessary.

Common causes

Most likely first

1. Faulty purge control valve
2. Blocked or clogged purge lines
3. Leak in the EVAP system
4. Faulty canister vent control valve
5. Defective EVAP canister

How to diagnose & fix

Work through it in order

1. Check engine light (MIL) illuminated
2. Vehicle may hesitate or stumble during acceleration
3. Decreased fuel efficiency
4. Strong fuel smell from the vehicle
5. Difficulty starting the engine