peugeot 607 2.2 petrol 2002 year p1153 code

hi i have recently this problem when i scan it with the tool is showing me the p1153 - H2OS insufficient switching bank 2 sensor 1 this that mean i need to change the oxygen sensor or something else.thanks

Just before you splash out on a new sensor, check the connections to the O2 sensors for corrosion.

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