Check Engine Light on with codes P0442 and p0455

[GBlackburn]

Ok everyone, can't get rid of these codes. I've tried the ole gas cap and that didn't help. I'm leaning towards the fuel filler neck and both hoses going to the fuel tank. The neck looks pretty rusty, and the hoses don't look the greatest. Without having a smoke machine, I'm truly guessing here. Any help would be greatly appreciated. Thanks.

 

[jnunymc]

Ok everyone, can't get rid of these codes. I've tried the ole gas cap and that didn't help. I'm leaning towards the fuel filler neck and both hoses going to the fuel tank. The neck looks pretty rusty, and the hoses don't look the greatest. Without having a smoke machine, I'm truly guessing here. Any help would be greatly appreciated. Thanks.

 

[jnunymc]

Did you ever figure out what caused the problem? There is a gap with the flap inside the fuel filler neck, and I am wondering if that is causing my check engine light to be on.

 

[Moglocker]

Holy old thead revival!,I just had these two codes over the weekend,it was my hose that goes to the charcoal canister on my wife’s 02 sport,I knocked it off working on the jeep

 

[jsfoster75]

Mine has P0122 and P0456 Going to work on solving those when it gets back from the frame repair...