Paul,

The embarassing truth is that the light no longer illuminates, so there is "currently" no problem to repair. Of course, I would never say anything like "the problem fixed itself"; but I would say, "if it ain't broke, you can't fix it." So, if it occurs again, I have some ideas on what to do.

I bought the car used from a dealer; it was a lease car in its previous life. I believe that existing warranties conveyed as well as some additional warranties from the dealer. I will have to do some homework to see what is still covered. I expect other Brickboarders will enlighten us as soon as they see your query.