2006 Chevy Cobalt p0135 o2 Sensor Check and Replace

06 Cobalt with a single code of p0135 bank 1 sensor 1 o2 sensor. Did a few simple checks and show you how to replace the sensor yourself and what tools you need. I did a few bi-directional control test off camera with my Autel but if its your only code and you do a few simple wiring checks you can be fairly confident you just need a o2 sensor.