Refueling Vapor Control Valve Circuit High

Common symptoms

What you'll notice

• Check the fuel cap: Ensure that the fuel cap is properly tightened or replace it if it is damaged.
• Inspect the wiring and connectors: Examine the wiring and connectors related to the refueling vapor control valve circuit for any loose connections or damage.
• Test the refueling vapor control valve: Use a multimeter to test the functionality of the refueling vapor control valve and replace it if necessary.
• Check the charcoal canister: Inspect the charcoal canister for any signs of damage or clogging, and clean or replace it if needed.
• Inspect the fuel tank: Check the fuel tank for any leaks or damage that may be affecting the refueling vapor control valve circuit.

Common causes

Most likely first

1. Faulty refueling vapor control valve
2. Loose or damaged electrical connection to the refueling vapor control valve
3. Faulty powertrain control module (PCM)
4. Blocked or restricted vapor canister
5. Faulty fuel tank pressure sensor

How to diagnose & fix

Work through it in order

1. Check engine light illuminates on the dashboard
2. Vehicle may fail emissions test
3. Decreased fuel efficiency
4. Difficulty starting the engine
5. Rough idling or engine stalling