flashing overdrive light
My wifes '03 windstar does the same thing. When going up a steep grade, I turn off the overdrive. After driving for a couple of miles, it starts to flash, I can't turn the overdrive off. I have to stop and turn the car off and then can turn it on and be on my way. I always assumed it was some safety precaution, just telling me to back off a little. I have never had to unhook the battery to erase the code. Someone out there has to know the cause.