I have this trouble code and I searched for it and it just says small evap leak. How does one know if there is a crack in one of the tubes that runs all the way back to the gas tank? Do you have to do the smoke test from the dealer? I have noticed that when I get gas, there is no pressure when I take the cap off. I was thinking there was a crack in the filler hose, but maybe it's one of the recirculating lines that ties in with the charcoal/evap canister? Thanks for any help!