Hi guys. Just checking is the P0135 code on a 2001 max the black O2 sensor? Going to replace it this weekend.... Thanks

 

OBD II P0135 :Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

http://www.courtesyparts.com/maxima-...1988_1992.html

 

Yes.

For future reference remember this: Click on the sticky "5th Gen General Information, Maintenance, and Common Issues" and scroll down about 2 screens to the illustration "O2 Sensor Locations and Corresponding Codes".