My SES light came on early this week and I ran the test and here is the code I get: P0138. I know its the Heated Oxygen Sensor 2 Circuit High Voltage (Bank 1). I have a 2002 Maxima SE and its still under warranty. Does anyone know if this O2 sensor is covered under warranty? Will the dealer give me a hassle because I'm basically telling them what the problem is? I know they'll want to do a diagnostic test and charge me $80. Trying to avoid this fee.

 

dude i got the same code also. i need to replace the 02 sensor as well. which one is it? just buy a 02 sensor and put it in yourself and save yourself some money.

 

If you have em replace the O2 sensor, don't they waive the diagnostic fee? I thought the fee was only levied if ya have em diagnose it but then not have em fix it.

Anyways... this:

http://forums.maxima.org/showthread.php?t=374481

Would have led ya to this:

http://maxima.theowensfamily.com/tsb/NTB02-051a.pdf

Stickies are your friend...

 

This is crazy how many O2 sensor posts lately. It must be something in the air. I am intermittenly poping that code too. Only twice now in about 3-4 weeks, not sure if it is ghost or not. The only times I saw it was when I came back from the track and was doing triple digits on the highway. But it is strange how many people are getting it now.

 

Yeah mine was throwing that code too. P0138. Got the same problem as you do. Mine comes on and comes off all the time. Realy got tired of it.