right, where to start. you cant have a bank 2 sensor 1 fault. it doesnt have one.
p1153, if you scan it with the correct tool, planet, you will find this means your throttle valve adaptation is incomplete.
p1... codes are manufacturer specific, and generic code readers can lead you on a wild goose chase.
anyhow, first thing i would be looking for is an intake air leak with this code.
or post some symptoms.
dave