the low coolant keeps flashing. i've checked the overfill and it has always been ok. could the sensor be going out? if so should i just ignore the flashing?
I could use more information like the year and engine size and any other information that can help me diagnosis the problem for you.
Never ignore the low coolant light. As long as the coolant level is good disconnect the sensor at the radiator to see if the light goes out. If it does go out then replace the low coolant sensor.