Yeah, I've had this CEL P0455 for a while.

Interesting thing is the other day I filled my tank to the rim. I mean really filled it. Every last drop I could get in the tank was put in there.

And the CEL went out... Code P0455 disappeared.

Then after I run it for about 60 miles the CEL comes back with the same code.

Is there something in the fuel neck that could be leaking?

 

Id like to know too, I have the same code on my '01

 

There's a fuel filler vent hose that connects the fuel filler tube (where you put the gas in) to the fuel tank. It could be that when you filled the tank up it covered the end of the vent hose and isolated the vent leak to the hose connection at the fuel filler tube, the fuel filler tube assembly, or the gas cap. Replace the gas cap with an OEM cap. If the problem persists, you'll have to remove the filler hose/vent hose cover under the Jeep and inbspect the hoses and the hose connections. If okay, it may be a bad fuel filler tube assembly.

 

Cool. Thanks!!