2003 XC90 T6 - Help with P0455 code

tpezzolo · Post by **tpezzolo** » 10 Aug 2014, 16:33

Hi all - I am searching for some advice on how to attach a "large emission leak", code P0455.

This started out as a small leak (P0456), I bought a new gas cap. I think it went away for a while, and now it is back as a large leak, and the car is noticeably running rough at higher speeds.

From what I gather, I should be looking at the evap purge valve, the canister, all associated vacuum lines. Can anybody tell be where to find these items on my car? Is there anything else I should be looking at? Does anybody have any guesses as to what commonly causes this?

Thanks in advance - Tony

Stravlr · Post by **Stravlr** » 14 Aug 2014, 14:59

start way easy - get another gas cap, the one you have may be faulty or not seal well. Other than that check all items to and from the charcoal canister; also check the fuel return line where it goes from metal tube to rubber at the fuel tank.

tpezzolo · Post by **tpezzolo** » 15 Aug 2014, 00:08

Hey thanks so much for the reply, is the cannister behind the rear right wheel well? That is my guess. I can't find it that easy.

Stravlr · Post by **Stravlr** » 24 Aug 2014, 13:19

No its in the engine compartment in front of the ECU/TCU.