So have 2000 nissan maxima California emissions. O 2 Bank 1 sensor 2 throwing fault code. Tried to locate. Where all image say it is I'm not seeing it. I've located 1 after cat and 2 in engine compartment. I picked up sensor from oreillys on that code and plug doesn't even match up to the 2 in engine compartment.



Anyone else have this problem?

 

Bank 1 Sensor 2 connector is the third (4 pin black connector) in front of the engine.
Bank 1 sensor 1 connector (3 pins) is located in the back of the engine, near the passenger side strut tower

 

I have 3 sensors. Bank1 sensor 2 between cat and muffler is my issue. It runs up through undercarriage insulated above. Tracking the wire and where it is ran through. Looks like have to drop tail pipe and more. Has anyone else had to fix this?

 

takes about 15 minutes to change the downstream fed spec o2 sensor. figure about 30-45 if youve never done it before. theres no reason to drop any section of the exhaust to access or replace it.

 

It's california emission. It ruinside frame of car. Is the connector under back seat?

 

plug is under the front seat area. if its CA emissions and you only have 3 sensors its an early 4th gen (as referenced in your photos). the only 5th gen to have 3 sensors is a 00 fed spec car.

 

Thank you.. yeah I spent some time spinning in circles tracing wires jacking up all sides of car lol because no video I have been able to find shows this version