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I have 98 Mustang GT - from time to time my low coolant light comes on. When coolant is checked it is always full...maybe sometimes add a small amount. Sometimes that makes the light go off, but this time it didn't. The car isn't overheating, everything looks normal except for the light. I have a new radiator, radiator cap, coolant overflow container, hoses, water pump, heater core. I don't see any coolant under the hood or under the car. Any help or ideas?? Thanks!
I had the same issue in my '99 GT. I just unplugged the sensor in the top of the tank and kept a regular eye on my coolant to make sure the level stayed where it should be. I think it's been a somewhat common issue with these cars.