b1 s2 o2 sensor (lambda)

[carterleeds]

can anyone help please. ive tried searching but cant find any posts

i took my car to get the o2 sensor (lambda sensor) changed but the garage dont know which sensor to change.

4.2 petrol v8

i told them i have 2 changeable sensors and 2 regulator sensors that stay in place so 4 all together i think.

now the bank 1 sensor 2 position location is a headache with them, i said bank 1 is passenger side, and sensor 2 is the changeable one near the manifold. am i right? thats what ive been reading so please dont shoot me if im wrong.

can anyone help or have diagrams to show where my sensor is so i can get it changed or even do it myself.

ill post up vcds if you want but its just saying, b1 s2 signal too high and b1 s2 intermittent or something but yeh ill get it up. just using different laptop my vcds laptop is dead, need to charge it