Check Engine Light code P0455
 

Also posted on XK-8 Board

1999 XK-8 48k mi. Have a Check Engine light that comes on shortly (50 miles) after refueling.

Took it to my local Jag Mechanic (good guy)and code comes up P0455 indicating "gross leak present" which theroot cause is usually a faulty orloose gas cap. Replaced the cap with new one from Jaguar,still have problem. Took the car in and my local mechanicperformed a gross leak check by inspecting the system and also using EVAP system to pressure test system. Everything tested OK.

Bottom line, I am being sent to the dealer because the only thing left would be apurge valve stuck closed.
Does anyone have a similar experience, suggestion or know how expensive the replacement of the valve will be at the dealer?

Thanks to all.

RE: Check Engine Light code P0455
 

If you have the dual charcoal canisters, there is this small hose about 2.5 inches long that goes from the passenger side canister to the canister close valve that develops a crack over time. I would check this first, should be easy to see if you get under there with a flash light from thepass. side rear.Its a common problem with earlier Xk's and since its a "GROSS" leak should be easy to see.

RE: Check Engine Light code P0455
 

Attachment 195254


Sounds like good info jhe!
Nice one

Let us know how you go firstjag

Jim

RE: Check Engine Light code P0455
 

If you have P0455 and no leak present I would suspect faulty purge valve. This is located in the left front fender well of vehicle. Do you smell fuel? Does vehicle idle well?