My SES light has been on forever!! My mechanic (who I trust implicitly) has replaced the sensors (light goes off for a bit, then back on)and has checked the car from bumper to bumper (light goes off for a bit, then back on)and can find nothing wrong whatsoever. However, this guy has a small shop without a lot of fancy computer gear. His computer indicates that the mixture might be too rich, but he did an emissions check and found everything to be fine. The car runs perfectly, but I am worried about the light!!! I am resisting taking the car to the dealer because my experience with Mini dealers has been awful, and they want $140 just to hook it up to the computer. When a dealer tells me "it could be anything" my blood runs cold. Am I stuck? Do I have to submit my car to an expensive fishing expedition from the hated dealer?? Help!!!!!