I got a fuel tank cap message as I was driving thru New Mexico in my 2020 Georgetown Gt5 with 20,000 miles, which propagated into a check engine light. Took it to a Ford Comercial vehicle dealer here in Southern California and after diagnosis was told the vehicle had a broken fuel tank vent valve and it was not covered under warranty as it was broken. Valve is located on top of 80 gallon tank with only about 6 inches of clearance between the top of tank and floor of unit. Valve nipple was actually broken off at hose connection. As there was no debris or markings on tank I find it hard to believe an outside source caused the break.
My question to all you is, have you had the same or similar failure?
My question to all you is, have you had the same or similar failure?