I have a 2000 Ford Taurus se with only 62,000 miles on it. It belonged to an elderly lady who kept it in her garage the whole time she owned it. The coolant level light came on a few times a couple of months ago and I checked it and the coolant was fine. It stopped for awhile and now it's back on tonight. I know NOTHING about cars. Any ideas what it could be? Senor and where would I find that? Is it expensive? Thanks so much!