I had this problem with my 95 Regal. I bellieve GM cars with the same module as the Chevrolet Lumina are Chevrolet Monte Carlo, Buick Regal, Pontiac Grand Prix and Oldsmobile Cutlass Supreme. The problem is a bad spark plug near the rear of the engine and/or wire set. Had all plugs and and the wire set replaced and the light stopped blinking. Other symptoms: False ABS Light, Check Engine Light, and Engine Stutter when held at 2000 RPMS.
Low coolant level in the expansion tank.
If you are talking about the low coolant light then it is just low of coolant. Add coolant to the recovery tank. If you are talking about the coolant temperature light, then the engine is overheating. You may need to have the cooling system serviced. Drain the coolant and flush the system. Install a new thermostat, and add a 50/50 mix of antifreeze and distilled water.
Radiator full and coolant recovery tank filled to mark Radiator full and coolant recovery tank filled to mark
There is a sensor that is in the overflow bottle that may be bad causing the "low coolant light" to illuminate. The coolant level switch is located on the bottom side of the coolant tank. The switch contains a reed switch and a magnetic float. When the coolant level is normal, the float rests away from the reed switch, causing the switch to be open. When the coolant level decreases in the coolant recovery tank below a specified level, the float rests on the reed switch and the switch closes, illuminating the LOW COOLANT light. The coolant level switch is a part of the coolant tank. If the switch needs to be replaced, the coolant tank must be replaced.
First off, check your engine coolant tank. If it's low, then that's the problem. Put more coolant in. If it's at the correct level, then look to see if there's gunk buildup. Second, is your engine overheating? If the engine is not overheating, and there is gunk buildup in the coolant tank, then you may just need to clean the sensor. If there is no gunk in your tank, your coolant level is fine, and your engine is not overheating, then it may be a bad sensor, and you need to replace it.
Check coolant level in coolant recovery tank and radiator
Low coolant in coolant recovery tank or radiator or defective sensor
low coolent/anti-freeze, check the tank and make sure it is full, if not, fill it to the full line. if the light doesn't go away, i would take it some place and see if the thermostat is working correctly.
Coolant is added to a 1996 Hyundai Sonata by opening the coolant overflow tank and adding coolant until the full mark is reached. This allows the cooling system to pull in coolant as needed from the reserve tank.
Bad sensor? Should be located at the bottom of the coolant recovery tank
Full to the level of the lower of the two lines that are molded into the overflow tank.
Check coolant level in recovery tank Perhaps a bad sensor. Sensor located in coolant recovery tank