o2 sensor location help

[suby01]

got the ses light. did the diagnostic and it came out to be sensor bank 1 sensor 2.

can someone please tell me which one it is. with a quick explanation for when i get under the car to replace it.

also if a part number would be great.

this is for a 2001 nissan maxima at.
tia.

[maxhopper]

Bank 1 is the side nearest the fire wall. There will be one sensor directly beneath the exhaust manifold (sensor1), sensor 2 will be the one after that, closest to the cat.

[MTZI30]

I think I had the same problem as you. Check out this thread, loystock is awsome:

questions-have-code-p0140-bank-1-sensor ... 06031.html

I heard there was a tsb that says to change both post catalyst 02 sensors so I did. Besides at their age you should anyway. Got parts from amazon.com.