I removed about 1/4" of the coolant and now the light doesn't come on until it's been driven about an hour, and then it was only on for about a minute. Looks like I might need to remove a little more. (It was over the level of the two hoses on the side of the tank, which could account for the coolant splashing around inside the tank).
Is having too much coolant in the tank known to trigger the light?
Brian
