The coolant level sensor may have a sludge build up on it. Clean it off and see if that shut the light off. If not you may need a new sensor.|||check the coolant level again|||sometimes what happens is the coolant level sensor gets stuck in the down position, try smacking the coolant bottle or wherever the coolant level switch is tojar it and it should pop back up, also, whenever you do any type of coolant service like hoses or thermostat there is sometimes an air pocket in the cooling system and will eventually burp and cause your coolant level to drop.
a good practice is to check the coolant level the next day after it cools down|||you have to bleed the air out.|||did you properly bleed the system?
