How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Eric Your Own Question
Eric
Eric, Automotive Repair Shop Manager
Category: Car
Satisfied Customers: 31313
Experience:  Automotive Repair Shop Manager, Technician/JA Mentor
3195632
Type Your Car Question Here...
Eric is online now
A new question is answered every 9 seconds

I have a 1997 Nissan Maxima GXE. Within the past six months ...

Resolved Question:

I have a 1997 Nissan Maxima GXE. Within the past six months the check engine light came on and I replaced front O2 sensor 1. Everything was fine until last week when the light came back on. I have since replaced front O2 sensor 2 (per diagnostic code) and reset the computer. However, the check engine light has come back on again with "P0136 O2 sensor circuit malfunctioning bank 1 sensor 2". Any ideas why the light has come back on when the sensor is brand new?
Submitted: 9 years ago.
Category: Car
Expert:  Eric replied 9 years ago.

Hi,

P0136 - Bank1 Sensor2 is the rear O2 sensor located behind the catalytic converter. This is the O2 sensor you need to replace. See below:

graphic

graphic

 

This is a Paysite

Customer: replied 9 years ago.
The 1997 Maxima has two front sensors and one rear sensor. The people at Autozone told me that bank 1 is the front and bank 2 is the rear. Is this incorrect?
Expert:  Eric replied 9 years ago.

Hi,

Yes, Autozone was incorrect. What I provide you is out of Nissan service manual.

Here is a diagram showing locations of Bank1 Sensor1 and Bank2 Sensor1:

graphic

graphic

 

For every vehicle this is how to tell which O2 sensor is being referred to.

Bank1 is side where cylinder #1 is located

Bank2 is side where cylinder #2 is located

Sensor1 is before the catalytic converter(upstream)

Sensor2 is after the catalytic converter(downstream)

This is a Paysite

Eric and 8 other Car Specialists are ready to help you