faulty o2 sensor? or vacuum leak?

I have a Ford Contour 98' I was having issues and found a major hole in a hose (crankcase ventilation shaft hose) and replaced ii but every now and then I will be driving on a straight stretch and it will feel as tho my horsepower sorta drops off or i hit ice then it kicks. This was the original problem with the vacuum hose but my check engine light is on for the upstream o2 sensor. I was wondering if this could be a false reading because of a vacuum leak or if it is most likely the o2 sensor?

Comments

  • The air leak can kick up a code when the O2 sensor reads an odd value, but the O2 sensors by themselves don't cause the vehicle to run badly or anything. An air leak can though.

Sign In or Register to comment.