More than likely this is the coolant level sensor. Can you take a picture of the light just to make sure?
If I am correct it is probably just the sensor. You have to replace the tank in order to replace the sensor.
This is not going to do any damage as long as the coolant actually stays full. Clearly this sensor is there to let you know that you are low on coolant but if you check the level regularly then there is nothing to worry about.
Here is the procedure to replace it. Let me know if you have more questions and send me a picture of the light just to be sure. Thanks
Images (Click to enlarge)
Monday, July 15th, 2019 AT 5:25 PM