ok guys i need your help. i replaced my 02 sensor a couple weeks ago because the car was having problems idling, and would occasionaly just run pig rich or extremely lean and hardly run. i replaced it with a bosch sensor, reset the comp, and now im still getting codes related to the #1 02 and the same problems. any ideas?

 

I don't know if it would be the same, but when I tried to use a Bosch sensor to replace my downstream sensor and it did not work. I had to buy a gm one.

 

maybe that will solve it, i have one on the way