My check engine light came on coming home from school, I went to autozone and they said it was the 02 sensor in my exaust, and if i dont get it fixed ill eventually lose gas milage and ill lose performance. And of all times I was due for inspection, which I failed because of this issue. But a day later The light went off. So im thinkin do I still have to get it fixed or did it just fix itself or was it never really broken. I havent noticed a decrease in gas or performance at all. what do I do? thanks in advance and my bad if this is the wrong place to post this.
Oh yea and I drive a Hyundai Accent 2002 GL.