i cant seem to get the O2 sensor off. i know i can unplug it, (the one that goes into the header) but i tried pushing the tab all the way in to no avail.

is there more than 1 tab that i need to puch in? if your looking up from the nottom, you can see 1 push in tab. is there another one somewhere on top that i need to push in too?? thanks!!

 

try squeezing it back together then taking it apart again. it sounds silly but it works for me.

 

always remove the plug from whatever holds(to like the block or whatever) it then pull it apart