i know their is total of 4 o2 sensor on our G35 but i want to know if the o2 sensor that goes into the cat. converter plays any major role on fuel/air mixture? i currently have one off on the pass. side due to some problem with my high flow cat installation. and need to know if it is safe to drive without the in placed. sorry if this question was asked b4 i'm pretty new to this site.... i hope i can drive my new ride to stillen event tomorrow.....arrrg...

 

hello...n/e one...need help...

 

no engine effects at all