Anyone able to make heads or tails of this data?
If it's the bank 1 cat that you're interested in, then the only sensors you need to look at are both Bank 1 O2
sensors. The upstream sensor should be switching back and forth between rich and lean, and the downstream should always be reading rich. If the downstream is switching just like the upstream (or starting to switch like the upstream), then the cat is bad.
Right now, one of my cats is getting so bad that I'm starting to hear pieces of the honeycomb rattling around.
Currently driving a 2009 Focus SE Sedan w/5-Speed!
1997 Geo Prizm
1996 Ford Taurus G
Formerly "Mr. X"