Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, code P0430, is it the O2 sensor? in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; Hello, I recently had a check engine on go on today, I had it scanned and the code read a ...
- 07-29-13 11:11 PM #1Cadillac Owners Member
- Automobile(s): 2004 CTS 3.6 L
- Join Date
- Jul 2013
- Los Angeles, CA
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.
- 07-30-13 06:43 PM #2
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.