Bummer. My old ride had that and it saved me a few times. It always warned long before things started getting serious. Ridiculously simple sensor - just a wire stuck into the radiator tank. It had a few quirks, but never failed/lied to me. My biggest problem was moving it from the old radiator to the new one. For some odd reason it wasn't molded in to the tank but as a replaceable item that was never included.It does not have a coolant level sensor.....so, beyond a visual there is no warning lamp for low coolant.