Where is the oxygen sensor on a 1992 Chevrolet Cavalier?

On a 1994, It should be on the manifold coming off the engine. It looks like the end of a pezzo lighter on the burner from a large barbque. On the manifold, it has one wire coming off it, just like the barbeque lighter and the shaft sticking inside the manifold should be white like the lighter. Why do you want to repace it? What is your check engine light on?