ware is BANK 1 SENSOR 2

Question

Can any one plz help me out, i have a 2005 (new shape) ford focus
(3dr hatch 1.6 petrol zetec T model) and the engine managment has came on, got it on the computer but no code came up so just cleared it, no problems for 2 weeks then same again, light is on again but there is no problems with the running of the car, i floored the car to blast any crap out of the exhaust to see if that was a problem and the light went off for a hour or so making me think its a exhaust sensor, light has come back on now and will not go off, took it back to a garage and it come up with a code p0036-HEATED OXYGEN SENSOR HEATER CONTROL CIRCULT BANK 1 SENSOR 2
ive asked ware do i find this sensor and the garage told me the top of the manifold but there is 2 there and he wasnt sure witch one it was so ive been to the parts shop to see how much there are, the shop is saying there are 4 of theses sensors 2 at the front of the exhaust and 2 at the back, i am tight on cash and need a cheap fix so cannot aford to change all 4 sensors can some one plz help me out witch one do i change, i will have a go at doing it my self if some one can help me out..............plzzzzzzzzzzzzz

plz explain in simple terms if i am under the bonnet of my car faceing the engine ware is this sensor

Answer 1

the car only have one bank since it 4 cyclinders, Bank 1 sensor 2 is going to be the o2 sensor after the catalytic converter.

before you replace the o2 sensor check the oxygen sensor fuse