I need the location of oxygen 2 sensor on 96 Maxima

P0150 - O2 Sensor Circuit Malfunction Bank 2 Sensor 1 Possible causes:
Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 - harness is open or shorted
Front Heated Oxygen Sensor Bank 2 - faulty electrical connection
Fuel pressure not right
Faulty fuel injectors
Intake leaks
Exhaust leaks

Read more: https://www.autocodes.com/p0150.html

Hi there:
DTC P0037 - Bank 1 Oxygen Sensor Heater Circuit Low

DTC P0057 - Bank 2 Oxygen Sensor Heater Circuit Low


Cause could be harnesses connections, wiring, HO2S heater itself or ECM issue. Diagram location in THIS LINK.


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Modern car engine control systems rely on input from several sensors to regulate the engine's performance as well as its emissions and other vital functions. When these sensors fail to provide accurate information, the driver may experience increased fuel consumption, driveability problems, emission failures, and other problems.

One of the most important sensors in modern cars is the oxygen sensor. Also known as the O2 sensor because O2 is the chemical formula for oxygen, the oxygen sensor monitors how much-unburned oxygen is present in the exhaust as the exhaust exits the engine. By monitoring oxygen levels, the sensor provides a means of measuring fuel mixture.

https://mailordertuner.com/blogs/news/02-sensors-and-why-they-are-important

My 96 has 4 cat converters, 2 (upstream and down stream) on each side. There are 2 oxygen sensors on each side, before upstream converter and after upstream converter. But make sure they are bad before you replace them (4 of them will cost you about $200), and my 1996 with 175K has 3 original still running. Other sensors (air flow, coolant temp) might be the problem as well.

MAP is normally on the throttle body. O2 sensors are always on the exhaust pipe, one near where the pipe attaches to the exhaust manifold the other back near the catalytic converter.

you will need the wiring diagram for the car the oxygen sensor has 4 wires two white which are the heater one positive one negative it doesn't matter which is which the black is ground the gray is the signal wire some have a blue wire black is always ground the blue would be sensor hope this helps

check out www.maxima.org

code p 0138 refers to 2 items
1--heated oxygen sensor(HO2S) 2 bank 1--high voltage ==causes --wiring short to positive --HO2S---ECM
2--oxygen sensor (O2S) 2 bank 1--high voltage ===causes wiring short to positive ---ECM
code p 0139 refers to 2 items
1--- heated oxygen sensor (HO2S) 2 bank 1--slow response ===causes --heating inoperative --wiring--ECM
2--oxygen sensor (o2S) 2 bank 1 slow response ===causes --wiring --- O2S

heated oxygen sensors9HO2S) are in the exhaust manifold before the cat converter
Oxygen sensors (O2S) are after the cat converter
it is indicated that the HO2S is faulty-
check the wiring and /or replace both sensors

hye there ,,there are 3   o2 sensors on your car,,one for each bank,,,and the 3rd sensor is located after the cat this one usually goes first,,,,just make sure you no if your cars an import or not as they can be different,,,then you should be safe when ordering ,,hope that helps,,,

Here is the location of the O2 sensor, Under hood, center, lower engine area, rear center of engine, mounted in exhaust manifold

and here is the location of the PVC valve, Under hood, center, upper engine area, mounted in intake manifold

So to your problem there is only one oxygen sensor according to your repair guide. If you need any other info on parts and location you can try Auto Zone .com