evaporative emission system pressure sensor P0451


Asked by Nov 17, 2016 at 12:14 AM about the 2006 Ford F-150 XLT Styleside 4WD

Question type: Maintenance & Repair

my 2006 has the P0451 code. what would be some
places to look first for the problem? also could it
be something with the filler neck because when I
try to fill it up, it keeps stopping like the tank is full
but it's no. I also live in Alaska so it's been pretty
cold, maybe that could have something to do with

4 Answers


It is more than likely a very small leak on your gas cap, or you filled up your tank while leaving the car running. If I were you I would not spend a dime trying to fix this. as far as the fueling of the tank....sometimes it takes longer depending on the position of the device. Generally these faults are related emissions and just make life impossible when it comes to a 10 year old vehicle.

1 of 1 people found this helpful.

alright thanks for your input.

1 of 1 people found this helpful.

Sounds like the fuel tank pressure sensor is faulty. This sensor is usually part of the fuel pump module assembly. HTH. -Jim

2 of 2 people found this helpful.
Best Answer Mark helpful

Ford just changed my sensor, two days later the light came on again! Try using the funnel provided under seat, poke it into the filler 5-10 times, My other vehicle (Flex) did that and poking it stopped the issue! If it's not the sensor they should change the filler!

1 of 1 people found this helpful.

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