I stopped by Advance Auto again to have the codes read and cleared. Codes P0441 and P0455 showed up, both having to do with the evaporative emissions system

. They cleared the codes and so far so good. The guy there mentioned that I shouldn't top-off the tank as this can fill up a canister underneath the vehicle that serves some kind of emissions purpose. I regulalry top off, especially when towing the camper as I can usually get 2-3 more gallons in the tank by doing so. Stupid emissions nonsense! I wish the EPA would just go away!