No. The most common problem with the low sensor light is the switch which is located in the radiator just below the filler neck. First make sure that the radiator is full. With the cap off, start the engine and then add coolant to the radiator. There are two bleed valves in the system. One by the thermostat area and the other by the by-pass hose close to the water pump. Be sure all the air is out of the system. The low coolant sensor gets dirty and causes this problem.
SOURCE: Coolant fill procedure
NEVER open the radiator when the car (or any other engine) is running!! The radiator is part of the pressurized cooling system (under that cap is coolant at 15psi)
Correct way to check the coolant in the radiator, is wait until the engine is COLD, then remove the radiator cap and re-fill.
SOURCE: Low Coolant light stays on
Check you coolant resevoir. The low coolant switch is located in the resevoir so if it is low on coolant there, the light will come on. If it is full, it could be that the switch is stuck due to gunk build up in the resevoir. Hope this helps you out
SOURCE: coolant in coolant reservoir did not fill low level in radiator
you must drain air out of system
so when engine is warmed up, just unscrew slightly the thermo time switch which is the highest sensor and unit in cooling system besides the reservoir, until alittle air releases then when antifreeze starts coming out then retighten to specs. BE VERY CAREFUL !!!! LOOSEN VERY SLOWLY AND NOT COMPLETELY REMOVE FOR THIS CAN CAUSE BURNS. MIGHT WANT TO USE A RAG AROUND SENSOR. If this doesnt solve it then make sure you have the correct rad. cap. Also that the filling hose is not clogged as well as the little port on radiator.
SOURCE: Low Coolant light flashing on 1996 Buick Regal 3.8
The low coolant sensor should be located in the passenger side radiator tank, You need to take it out and clean the sludge off of it for it to work right. Or you can just unplug it and forget about it, the light will go out and it won't cause any problems.
SOURCE: low coolant light is on with full radiator
Check the coolant top up reservoir. Low coolant sensor is usually in the overflow/reserve container.
Wash out and clean any dirt or corrosion from the sensor prong.
Refill to correct level with fresh coolant, then recheck alarm operation.
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