The code has been gone for about 5 days now. It just randomly turned off while driving. So I went and hurried up and took my emissions test and passed. Now I don't care if the code comes back. I'm good for the next 2 years. haha. Thanks for all the input.

 

ok, the code came back on out of no where this weekend. gas mileage instantly went to shit. I am starting to hate this damn thing.

 

Ok guys where to start.... I have been working on this issue for a couple of hours... ( not a skilled licensed mechanic but able to find my way around) I had a code pop for P0037.... This is the H02S2 ( down stream) O2 Sensor Heater Circuit... This is meant to heat the sensor to around 750 deg. I was able to get these docs from Nissan... Found out I had a broken wire near the fire wall and cross members... I will try to get photos of actual location later... Any one still having issues I would try these steps first before spending the $100.00 USD on a new O2 Sensor....

my test as follows : Diag Code 0037, Rear O2 Heater Low Current, 02 Heater Resistance High at 9 OHMS, should be 2.5-5. No Voltage to Heater Circuit at O2

 

Hell of a first post, Good Job!!!