Assuming this is a 3.0 engine, bank 2 would be the three cylinders up front (2,4,6). Bank 1 would be the three cylinders in back (1,3,5). So bank 2 sensor 1 is the O2 sensor right up front that you can see easily.
1997 Nissan maxima which side of engine is right bank
There are several things that can cause your Nissan Maxima to pull to the right. The most common reason is the wheels are out of alignment.
no
The alternator on your 1999 Nissan Maxima can be found on the front of the engine. The alternator will be on the right hand side of the engine.
If your Nissan Maxima has a VQ20 engine, then it's located at the back of the RH Right side front wheel.
To the right of your gas pedal under the dash
ohm it out at the connector on the right side of the engine. if it is no continuity it is bad. it has very high ohms though so you need a good meter.
My '90 Maxima did the same thing. I think it was something called a freeze plug.
Under the Right Front Passenger Seat
Under front of right console
I would say it is the cam sensor, that would cause more problems with the idle than the throttle body. Have it scanned for codes, if it is the cam sensor then the computer will let you know.
It is on the right side of the motor when you are facing the radiator. You will need a #10 socket and a swivel head and a long extension. I recommend you change the connector piece and the wire when you are changing the knock sensor to get maximum performance.