Originally Posted by roadkillrob
If you have catted downpipes, why do you need O2 sims - I have AR catted with all the O2 sensors installed and it passes OBDII smog check no prob.
Do you really mean you have catless downpipes?
with my catted pipes and on map 2 it still throws the cat code but obviously the cats can still do the job of passing the sniffer so I should be good to go. Would setting the tune to map 0 still throw the cat code?