OBD2 code P04b4?

2018 FORD FUSION HYBRID

150,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC

DUSTIN5501

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I have a 2018 ford fusion energi, its hard to add fuel to the car, has a engine light and code for P94b4, for refueling vapor control valve stuck closed. I ordered a part for this PN MTC FVS2 which is the vent valve. First i can not locate that vent valve on the car, looked around the vapor canister no luck... what is a fix for this code?

Mar 7, 2026 at 6:24 PM

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STRAILER

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Hello,

SO they say this valve is located on the fuel tan filler neck but I don't see it so you might need to do some looking to find it, I am afraid the valve is on top of the tank. Try removing the rear fender liner that the filler neck is on to see if you can find the valve.

P94B4 - Refueling Vapor Control Valve Stuck Closed

Here is the only image I can find but they don't say if it is the right valve or not. Check out the images (below). Please upload an image or a short video in your response, so I can see what's going on. Ken

Image (Click to enlarge)

Mar 8, 2026 at 9:22 AM