OBD2 code P04b4?

Tiny
DUSTIN5501
  • MEMBER
  • 2018 FORD FUSION HYBRID
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
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?
Saturday, March 7th, 2026 AT 6:24 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,054 POSTS
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
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Sunday, March 8th, 2026 AT 9:22 AM

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