Hi there, I also had this problem with the o/d light in my 97 Mystique.I took it to ford and they say they couldn't find anything.But after I got the car back it's not flashing and I haven't had it do it now in 2 months! Wierd...but I think it's one of those added little mysteries that come with the car....trust me I've had all kinds of wierd problems with my car and I've only had it for 4 months!!! My 1st Ford.!