Well, if the low coolant light is on, and the radiator is full, the sensor is bad or contaminated(can check circuit, by disconnecting the level sensor, and light should go out)......you can put a new sensor in, but if that coolant has not been flushed in a long time(with your year, fluid should have been changed 4X's), just putting in a new sensor, is not the answer.....because the old coolant can contaminate it again....could happen right away, could take time, depending on the condition of the coolant....