Im getting a P0138 Heated O2 Bank 1 Sensor 2. After looking at the FAQ's and all around nothing tells me where Sensor 2 is (the faq only has a front and rear sensor both are Sensor 2).

The only thing I can get out of that Diagram is that it might be the O2 sensor on the back (firewall side) after the Pre-Cat? Am i right or wrong?

 

Ask Puppetmaster, he is our self-proclaimed muffler *****. He'll know.

 

YOU ARE CORRECT sine engine is like this i think 1 3 6
2 4 5

so bank one is the back one its a down stream 02 sensor get a 02 simulator and problem fixed

 

Bank 1 is near the Exhaust manifold i think, its the one with the blue cap just follow that wire down and youw ill find it

 

I've got what I need to fix it , Ill be hooking it up this weekend and while Im at it I will be looking at the front manifold

 

What the hell does that have to do with O2 sensors?

 

For future reference, there are some helpful diagrams here:

http://maxima.theowensfamily.com/tsb/NTB02-051a.pdf

 

Exhaust, Muffler whatever.

 

bank 1 = rear manifold
bank 2 = front manifold

sensor 1 = primary
sensor 2 = secondary

 

Thanks for the help all.

And thank you Larrio for answering my question.

 

thank god I see someone knows what bank 1 and 2 are along with upsteam and downstream O2 sensors.