I bought the truck used several months ago, had some computer issues and the catalytic converter clogged up. all that has been replaced, my question is I am getting a p0455 code with is emissions large leak. from the canisters under truck a hose comes out of the canisters to the leak detection pump the to small round filter looking things. then it connects to a plastic pipe heading toward the motor. but it is just an open pipe about 18" away. where does this connect so that I can clear the p0455 code?