Low Coolant light comes on and stays on

Hi i have a 1994 Bonneville ssei and the low coolant light comes on and stays on the coolant is up where it is to be and wanted to no if anyone would no what it could be .and the anti brake light stays on and the trackin control lights on and when you press the button it does not go out what can that be too .can anyone help me .

Mine's een doing that since I bought it. I'm suspecting a faulty sensor. I parted out a 97 and one day put the sensor in my 93.