1996 Saturn SL2

First of all thank u for ur donation it really helps to keep this site going and answering everyones questions. First thing I would check is ur coolant level in bottle when its cold make sure its up too the seam if it is then check ur back up fuse in the under hood fuse box its a 10 amp mini fuse if thats blown then the light will stay on. If all thats good and the light stays on then unplug the sensor at the bottom of the bottle and jumper the two connectors and cycle the key if it goes out bad bottle if it stays on then u have a wire or connector issue from the bottle. Let me know what u find so we can talk about it.

If ur light only comes on when the coolant is low then it's not the sensor. Sounds like u might have a external leak. The most common places are on the radiator tank right below where the hose goes on the tank cracks and leaks. The coolant cap not holding pressure venting coolan off. An the water pump leaking. Also sometimes the coolant bottles leak from the bottom also. Check those places out if u can't fund anything there then u will have to have ur cooling system pressure tested or add dye to the coolant. Let me know what u find.