O2 Problem P0150 Bank 2 Sensor 1

[BigBadBen]

Good Day,

I have this code coming up on my 95' Maxima with 150K miles on the clock.

I read the code using my Auto Enginuity code reader. I believe this is the pre cat O2 sensor on the passenger side.

I am I correct about which senor it is and would it be safe to say that this O2 sensor is defective?

Do I need to buy an OEM sensor or can I get an aftermarket O2 sensor, if an aftermarket one is OK what would the PN be.

Thanks in advance

Ben

[Magnes]

The title for trouble code P0150 is "O2 Sensor Circuit Malfunction Bank 2 Sensor 1". So it might be the sensor, but it might not (sorry). Check the connectors, harnesses and so on, if they are OK then you likely need a new sensor.

Bank 2 exhaust is the one that comes off the back of your engine, and sensor 1 is the one upstream of the catalytic converter.

[BigBadBen]

Magnes,

I was under the impression that Bank 2 was at the front of the engine according to the "How too" section.

Cheers,

Ben

[NISTECH]

Bank 1 is ALWAYS the bank with cyl #1 on it. So bank 1 is the firewall side. Bank 2 is the radiator side of the engine on this car. It is likely the O2 but check the connector and the harness near it for problems before just replacing it.

[Magnes]

According to Mitchell, cylinder 1 is part of the cylinder bank facing the front of the car, but I'll trust NISTECH over Mitchell any day.

[BigBadBen]

Cheers NISTECH.

Have a great day guy's

BBB