hey guys well yah u guessed it the o2 sensor in my header just through a code. Now my question is how do u change the 02 sensor cuz i really dont trust these mechanics who are @!#$ with my car right now. also where can i buy it can i just go to autozone and replace it or what. Its making a big hissing noise near the header and we scanned it and thats what it said p1133 look in sticky for deatails on the code. I have a injen intake obx header magnaflow cat and catback. I have a 2200 auto sunfire. please help guys.

go to autozone rent one of there O2 Sensor kits that comes with every thing to take it off and put a new one back on.