Thanks for the replies. Funny thing that additional codes got mentioned because there were two others, P0455(EVAP leak,large) & P0442(EVAP leak, small). I have since found out that the gas cap is missing(gotta love your kids) and would assume that is why those codes are showing. I will install a new cap and let you know how it goes. Is it possible that a missing gas cap would be responsible for the cat conv code (P0420) showing up or is that wishful thinking?
and would assume that is why those codes are showing. I will install a new cap and let you know how it goes. Is it possible that a missing gas cap would be responsible for the cat conv code (P0420) showing up or is that wishful thinking? 
