Hey everyone! I am new to the site and i am having issues with my 97 sentra! I have been getting code p0400 and then i clear the code with the obd2 i bought and then anywhee from 20 to 60 miles later i get either the same code again or p0136 will come up. I have been so frusterated. I do all the work on my own car and refuse to take it to a shop and pay labor unless i really have to. I am not gonna just replace every part. i have the bank 1 sensor 2 o2 sensor from autozone costing me 72$. i am gonna try to get a egr from the junk yard and see if that will fix the issue.. Any help and tips would beawesome. Thanks..