RomRaider

I'm trying to diagnose a p0420 (cat efficiency) and I wanted to look at all 5 O2 sensors. I'm using the v290 logger definitions with romraider. My car has California emissions so it has three catalytic converters with 5 total O2 sensors. I see that the logger has A/F ratio 1 and 2 then front O2 1 and 2 and finally rear O2. Is the AF 1 and 2 the first set of O2 sensors in front of the catalytic converters then front is the O2 sensors behind the cats with rear being the one after where the two come together and go through another cat? Ive attached a picture of what I am looking at.

AF 1 & 2 are wideband sensors before the CAT used for closed loop control. O2 senors are after the CAT to monitor CAT efficiency. Once you get a connection to the ECU the list will be updated with the sensors supported by your car.

Thank you