code p0451, check engine light?
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Senior User
Joined: Apr 2004
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From: mt
code p0451, check engine light?
On my 2008 f350 with a v10 just had the check engine light come on. I hooked my scanner up to it and it give me a code p0451. I am just about to go on a trip today. Is it ok to drive it like this, what does this code mean. Thanks.
Cargo Master
Joined: Jul 2009
Posts: 2,885
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From: Chino, California
It's ok to drive. It just means that your fuel tank/cannister can't hold a vacuum when it tests for it. Or, not sensing a vacuum. That's how the computer detects if there is a leak in your fuel system. Could be as simple as a bad gasket in your gas cap.
It's almost like driving with your gas cap off. That light is annoying, though.
It's almost like driving with your gas cap off. That light is annoying, though.
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Joined: Nov 2012
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p0451 code
Last year at emissions inspection I was told to get a new gas cap. I did, however, my check engine light came on. I had two mechanics check on the code and they said not to worry about it. Well, this year I failed the emissions test and went to another mechanic. He said I needed a Ford factory gas cap, which I purchased and put on. He reset the codes to ready and within a few hours the light was back on. Now the mechanic wants to drop (?) the gas tank to look for leaks. I am starting to get into real money on a 2004 suv with 128,800 miles on it. I called Emissions Control as directed on their website to see if there is a waiver or alternative and left two messages no return calls yet. My tags expire in 4 days. Any ideas?
Thanks,
Thanks,
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