code P0430, is it the O2 sensor?
I recently had a check engine on go on today, I had it scanned and the code read a P0430, " catalyst efficiency below threshold bank 2". Should I change the O2 sensors? and if so, does anyone have a diagram or a "how-to" pictoral? Any suggestions would help.
Re: code P0430, is it the O2 sensor?
I think its more likely to be the cat going bad than the 02 sensor, you could replace bank 2s sensors before shelling out I guess.
similar car similar issue: http://www.cadillacforums.com/forums...420-p0430.html
he had to have both cats replaced.