ok here is my situation. I have a CEL for o2 and knock.. and i noticed that when i put the car in the ACC position that im supposed to be in to check my codes, my CEL light already flashes the codes without me messing with the ECU screw.. is this normal or what?

 

Is your ECU screw set back to its "normal" position - see the stickies for more info on whats the normal position.