Skip the auto shop - Our mechanics make house calls

Q: Check Engine Light is on with the P0451 code

asked by on

i have  a 2006 f150 with the P0451 engine code for the evaporative emission system pressure switch. when I put fuel in the tank, the nozzle stops like the tank is full but it isnt. would the problem be the fuel tank pressure sensor? if it is would unplugging it let me fill the tank with no problems? what else could it most likely be?

My car has 91000 miles.
My car has an automatic transmission.

Hi there:

Unplugging the fuel tank pressure system would unleash an entirely different set of problems - mainly the truck wouldn’t start. This error code typically indicates that the EVAP vent solenoid is damaged or faulty, which creates excess pressure inside the fuel tank and can cause the problem you’re having. I’d recommend having a certified technician, like one from YourMechanic, complete a further digital scan to determine precisely which of the EVAP sensors or valves is causing this problem then replacing it, reset all error codes, and see if the issue goes away.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Check Engine Light is on with the P0451 code

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Is engine replacement complicated?

This would be impossible to answer since the Crown Victoria never had these engines and adding the larger engine with unknown changes from one engine to the other. The motor mounting, exhaust manifolds, wiring harness and computers are all different....

Q: Difficulty starting, occasionally there is no cranking

The security chip and the sensor ring that sees the chip can cause the issue. The first thing to try is another key that is not worn. If this works, then have more keys made; this should fix your issue....

Q: My Ford Expedition shuts off while driving and theft light comes on and beeping sound

Hello, It sounds like something has triggered your theft control system. This system is designed to cut off power to the vehicle when it is triggered which is why it cuts out as you try to accelerate. This can happen...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...