Thanks for all the info. I'm no mechanic but I learned alot with all the posts. About 2 years ago (20,000 miles) I changed Plugs,Wires,Rotors,Caps,Fuel Filter and Air Filter. Timing Belt and Water Pump were changed 75,000 miles ago. ECU Unit was changed 60,000 miles ago. I have had the car for over 10 years and never changed the Oxygen sensors and I doubt the owner before me ever changed them. The car seems to run fine. There is no difference in performance since the light came on. For the past 3 months the car has sat in the garage and would not be started for 2 or 3 weeks at a time. I'm hoping that maybe that has something to do with it. I think I'll throw some injector cleaner in the tank and after I run a few tanks thru, as long as the car is still running good, I will reset the code and see if it stays off. If the light comes back on then I'll go after the Oxygen sensors. Thanks so much for all the information.