Hey guys - I tried to search this info before starting a new thread but I did not find any info on this. My check engine light on my 2002 is on because of a faulty o2 sensor, I bought that CarMD tester and these are the results:

HO2S-12 (Bank 1 Sensor 2) Circuit High Input (Rich Shift)

This fault code indicates the Comprehensive Component Monitor (CCM) has detected that after a preset period of operation, the signal from the Oxygen Sensor (O2S) (Bank 1, Sensor 2) was higher than the maximum expected value. The O2S is the principal sensor in the fuel mixture feedback control loop. The vehicle’s computer uses the signal from the O2S to adjust fuel delivery to compensate for “lean” or “rich” fuel mixture conditions. The CCM monitors the signal output from the O2S and verifies the signal is within acceptable limits.

I see that it's sensor #2, but which sensor is that? Is there a specific name for it? I searched ebay and it didn't really say which sensor was which. I just do want to spend $80 on the wrong sensor:/ Any insight would be appreciated

Thanks in advance!

 

Check out this sticky -

http://forums.maxima.org/5th-generat...on-issues.html

 

Thanks man!!

 

I have same sensor bad right now, I believe its the sensor closest to the firewall on the bottom...having mine replaced tomorrow...good luck!!