Try putting rubbing alcohol in your gas tank with about a quarter tank of gas when you get tested, It will level the hydrocarbons. Make sure you have ridden a couple of miles first to make sure its mixed in. You should pass if all they do is stick that thing up yer pipe .
Go to advanced auto and ask to borrow the code checker then clear it out
I have been getting a PO420 Bank one problem any ideas??? comes on every so often got a high flow cat on