[[email protected]]

I have a 2000 Maxima, the rear 02 Oxygen sensor is bad.
I can change it out but where is it?

 

[pete?]

should in front of the cat.

 

[titan_213]

well Pete is a dumb a$$, if is a rear o2, that would mean it is after the cat, hence the name rear O2

 

[jgosses]

1 or 2?

I have a 2000 Maxima, the rear 02 Oxygen sensor is bad.
I can change it out but where is it?

You could have 2 rear (after the CAT) sensors, Federal cars have three O2 sensors 2 before the CAT and one rear, California cars have 2 of each. the connectors for the O2 sensors are on the front side of the front (Bank 2) valve cover between it and the radiator California 4 connectors, Federal 3. See TSB NTB02-051 at http://www.infinitihelp.com/Ownership/Bulletins/Nissan/2002/NTB02-051.htm for a location drawing and what Nissan recomends for this condition.

 

[Puppetmaster]

You could have 2 rear (after the CAT) sensors, Federal cars have three O2 sensors 2 before the CAT and one rear, California cars have 2 of each. the connectors for the O2 sensors are on the front side of the front (Bank 2) valve cover between it and the radiator California 4 connectors, Federal 3. See TSB NTB02-051 at http://www.infinitihelp.com/Ownership/Bulletins/Nissan/2002/NTB02-051.htm for a location drawing and what Nissan recomends for this condition.

That's a great diagram there.

Find out the exact code and you'll know exactly which sensor it is. I have a FSM for the 2000 and so if ya need help with the DTC, post here and I'll see if I can help ya with it.