The coolant is not low, it has been checked, and checked, and checked. The coolant level is fine. I have learned that if the coolant level is truly low, you should hear hissing and noises under the hood, maybe even steam because the motor should be overheating by now. And it is nope, nada, zilch....thank heavens no noises, just a stupid light. The fuse is fine, don't know anything else to check because a computer didn't even pickup on a cause for this.