Definately the low coolant light.The radiator is full,the overflow is full.There have been a few threads up here and if you do a google search of the low coolant sensor issue there are alot of others that seem to have the same issue..Theres a few how to change the sensor on the internet (sparkys answers) but from what ive seen replacement doesnt resolve the light being on.Anyway im thinking im just gonna unplug it.