P0451 Evap code

[PoppaT-THOR]

I have a P0451 error code on my 2023 Thor Challenger w/7.3L engine. the RV service department checked the fill tube to make sure it's not loose, but other than that, they don't have the equipment the Ford dealer does, to check the rest... Any thoughts on what else it could be? Trying to save money and repair it on my own, but I don't have the testers.

 

[PS89]

A P0451 DTC is indicating a concern with the Fuel Tank Pressure (FTP) sensor, part of the evaporation emissions system.


The emissions system has a federally mandated 8/80 warranty (except CA which is 7/70). Make an appointment with a Ford dealer who can work on it. Don't be surprised if they have to drop the tank to get to the sensor. Not sure how much access is available on the 2020-on F53 chassis.

 

[16ACE27]

i have a P0451 error code on my 2023 Thor Challenger w/7.3L engine. the service department checked the fil tube to make sure its not loose, but other than that, they don't have the equipment the ford dealer does, to check the rest... Any thoughts on what else it could be? trying to save money and repair it on my own, but don't have the testers

Have you seen this thread?

https://www.thorforums.com/forums/f44/2023-thor-miramar-f53-chassis-check-engine-light-38345.html

The obvious answer is: Take it to Ford to diagnose/repair a problem on the Ford chassis.