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Discussion Starter #1
Started out with a "small evap leak" code. Replaced gas cap with two different new ones but code kept coming back. Suddenly, I started getting p0455 "large evap leak." I replaced the evap solenoid and reset the code. It came back on after about 40 miles. I left the light on for a few days and it then shut itself off. However, 90 miles after it shut off, it's back on. I had it smoke tested the other day but no leaks could be found. I can smell gas fumes, at times, near the filler tube and between cab and bed. Any ideas?
 

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Formerly Metal_EMT
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1,880 Posts
I had this problem and in my case the body shop never properly installed the filler neck to the bed and the top of the neck would sometimes move below the top edge of the body creating a gap in the seal and causing the leak. I would get the filler cap notification on the DIC then at the next engine start, code P0455 would set.
 

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Discussion Starter #5
I replaced the one by the fuel tank. Had another cycle when the light came on and went off on it's own two days later. Currently no light. Taking it back Monday and they are going to smoke it again.
 

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Discussion Starter #8
I found the leak. Got new tires to put on so while I had the old ones off, I removed the wheel well liner. The fuel line coming out of the fuel pump is wet right at the pump. Looks like the tank will have to be dropped. I was really trying to avoid doing that.
 
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