you are incorrect...the two o2 sensors are for cylinder 1,2,3... radiator side to cabin goes from 123 and 456.. so the first sensor on the top radiator side is bank 1, sensor 1... bank 1, sensor 2 is the sensor closest to radiator side, but the one after the cat.
LOCATION:
cabin ----- 6-5-4----------3-2-1----- radiator
6-5-4 is bank 2 (cabin side)
3-2-1 is bank 1 (radiator side)
sensor 1 (means upstream) they are located before the catlytic convertor.
bank 2 sensor 1 is located on 6-5-4 (cabin side, pre cat.)
bank 1 sensor 1 is located on 3-2-1 (radiator side, pre cat.)
sensor 2 (means downstream) its located after the catalytic convertor..
bank 2 sensor 2 is located underneath the cabin (last o2 sensor)
bank 1 sensor 2 is located underhood (under bank 1 cat. )