2002 Chevy cavalier o2 sensor.
I have a 2002 chevy cavalier, and the check engine light has been on for almost a year, I think it's the o2 sensor, but im not positive. The car kinda shakes when its running, and sometimes it takes a second or two to start up. Im not sure if those problems are related however.
go scan your trouble code, it can be a missfire, or the cat or coilpack, o2 sensor, come back with the trouble code ;)
if you have a obd 11 code reader have it checked for a code it will give you a P code with 5 didgit # from there let me know and ill tell you whats wrong..Illiminate the guess work.