Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
On Board Refueling Vapor Recovery System: Notes
When refueling vehicle, fuel tank pressure increases. When pressure reaches the setting value of the Refueling Control Valve (RCV) opening pressure, RCV opens. Allowing air and vapor pressure in fuel tank to pass through EVAP vapor cut valve into the EVAP canister. Where fuel vapors are absorbed by EVAP canister activated charcoal and air is purged to atmosphere. When during refueling process fuel tank becomes full, refueling EVAP vapor cut valve is closed and refueling is stopped by auto shut-off. Vapors stored while fueling are purged when vehicle is driven. RCV is closed during driving and EVAP system operates same as in conventional systems.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.