Originally Posted by Vbp6US

I went to a mechanic shop which said my check engine light indicated a P0430 code. I don't know what that means other than it's an O2 sensor reference. I did some research and found out it's Bank 2 so here is my question:

How many o2 sensors are there per side? It says bank 2 but aren't there two per side? How should I troubleshoot which one is problematic if there are two per side?

Thanks