Hello everyone.


I am the proud owner of a 1994 cutlass supreme 3.1L V6 4 door sedan. It will not however pass Connecticut emissions.


If it is not the O2 sensor, what else might it be?


I also have to mention that there is a pinkey nail size hole in the valve cover. Would that have anything to do with it?


Also where would I find the O2 sensor and is it relatively easy to fix?


thanks!