Coolant light keep coming on - 2001 Saturn SL

Coolant light keeps coming on - Bimmerfest - BMW Forums

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Jan 12, 2011 - 21 posts - ‎9 authors
Coolant light keeps coming on E46 (1999 - 2006) ... stick was where it was saying it should be in the manual (poking up just above the rim). ... Perhaps your coolant levelsensor is on the fritz. ... Lots of roads, including major highways, are still closed due towater or sludge and rubbish left over from flooding. Has your pre-LCI F30 been reliable so far?
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check that the sender for the coolant level light is in water ( check that the place where the sender is full of water. Check that the wire to the sender unit is not broken

the coolant light needs water to keep the light off. Check the coolant level in the radiator and not the reservoir. If the wire to the sender unit is broken or not making good contact then the low light will also come on.

have you checked the hoses and water pump.

check your temp sensor

Low coolant doesnt have anything to do with the thermostat. If the coolant bottle was over filled, it will push out, it needs some air space. only fill it to the full line. If the low coolant light is on, but its not really low, the sensor may be bad. Be sure to use the correct coolant DEXCOOL.

50/50 antifreeze and water. pontiac or GM recommends the use of Dex cool antifreeze but it really doesnt matter. You have to check the color of the coolant orange you need to use extended life, if its green just use regular 50/50

is the coolant level low when it comes on, due you have to keep adding coolant to the surge tank, have you repalced the surge tank cap?

check if the engine is over heat,it it over heating ,definitely the coolant will dry,so check is,hope that clear your mind and help you

it is the coolant level sensor that is making the light come on, your car does not have to be overheating for it to come on.
once the coolant level goes below the sensor it turns the light on.
If you fix the leak it will stop the light going on unless the sensor is faulty.
Hope this has helped.