Guys, The Service Engine Soon light has come on in my 90 Reatta convertible. The car runs great (especially on the expressway). Can this be an electrical glitch within the electrical dashboard or does the engine need servicing and if so what? The car has 160K miles on it. I don't know when the timing chain was last replaced. Also, The "Door Adjar" light comes on and stay on while driving. None of the doors are open so I don't know it is saying this. Again, can it be a electrical short? Suggestions? Anselmail