Question about 1995 Oldsmobile Cutlass Supreme

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Low coolant light come on and off while I am driving or just starting. There is plenty of "water" in radiador and overflow tank.

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Be sure the right coolant is in the car, orange colored Dexcool. I fthats good, then replace the coolant level sensor, in the right tank of the radiator. near the headlight. Of some cars its easier to replace the sensor if you take the headlight out.

Posted on Jun 05, 2010

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Posted on Jan 02, 2017

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1 Answer

Does a blown head gasket cause pressure build up in a surge tank


could be a air pockets in the coolant system that have top bled out
it is a simple exercise to have a compression test done to check for head gasket or cracked head

Mar 14, 2017 | 1999 Cadillac DeVille

1 Answer

My low coolert light stay on. the gague shows normal oper, and has plenty of anti-freeze


Have you checked the coolant level in the overflow tank/reservoir? If the level is fine the sensor or wiring to it is probably faulty.

Mar 06, 2011 | 2001 Chevrolet Impala

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My 1997 Saturn SW2 overheated a few weeks ago due to over-reving. Engine temp was bouncing up and down after that. I figured the thermostat went bad as the car has 200k miles on it. Now the coolant level...


plenty of water in the reservoir
none in the radiator
the coolant level sensor is in the radiator and if it is flashing , that indicates no water in the radiator tank and that is the cause of the overheating

Nov 13, 2017 | Saturn SW2 Cars & Trucks

3 Answers

My low coolant light comes on and there is plenty of fluid in the radiator. why?


The sensor that detects if the coolant is at a low level may be bad. It will be in the bottom of the coolant overflow tank. Some are screwed into the side or on the bottom.

Jul 14, 2010 | 1997 Pontiac Grand Prix

2 Answers

Coolant lightcame on (2004 Cadilac deville. Had


Is it the LOW coolant light? Your car is equipped with a sensor on the expansion tank (radiator overflow). Right front fender. It's there for when the car heats up. As the engine heats up and the coolant expands it racks into the reservoir/overflow/expansion tank. When the engine cools, it sucks the coolant back in. If your car was low on coolant then there's a good possibility that as it cooled, it sucked the recently added fluid in. Check that it is full to the "cold full" level by looking at the tank before you start it for the day. If it's not, then the sensor is telling you to add coolant. If it is, then the sensor in the tank may be bad.

Mar 14, 2010 | 2004 Cadillac Deville

2 Answers

Low coolant light on but car is full of coolant


check for a shorted sensor, disconnect wires light goes out, = shorted sensor, light stays on = you have a shorted wire, check wire leads to sensor... this should help... please rate my help, thanks

Aug 08, 2009 | 1997 Buick Skylark

2 Answers

Low Coolant light


Sounds like your sensor unit in your coolant overflow tank. Like nearly everything man made that floats, they will eventually leak (become water logged). This is a relatively cheap fix, as long as the light is coming on and the coolant level in the overflow tank is between the MIN and MAX lines in the overflow tank. This means that the float in there is dropping below the actual fluid level (watter logged) and you need to get a replacement sensor unit (aka sending unit) for the overflow tank.

Otherwise, if the coolant level in the overflow tank IS BELOW the MIN level line on the tank, then you are losing coolant somewhere and that is when things start to get expensive (might be a radiator problem, head gasket, cylinder head, heater core, etc).

Jul 19, 2009 | 1997 Pontiac Grand Prix

1 Answer

Low coolant light is on put there is plenty of coolant and car is staying cool according to gauge inside.


Hi..my name is Keith..i have a 1997 Ford Taurus..and i also have a low coolant light on..but i have a small hole in my overflow tank and it wont hold fluid..but my car dont overheat either..just the light is annoying and i'll get around to fixing it oneday..so...the only things i can think of that has turned your light on is....1..that you need to put coolant in the overflow tank...2..you have a hole in your overflow tank(like me) or 3...the quanity sensor in you overflow tank is bad..so i hope this has helped

Jul 04, 2009 | 1999 Ford Taurus

2 Answers

The low water light stays on. the car has plenty of water. Its overheating, I know the fan is not coming on. Is the fan motor out or is there a sensor that may cause the problen?


Now you have to find out why the fan motor was fried. The will usually last a very long time. Also your low coolant light and the fan not coming on are totally unrelated.

If the low coolant light comes on and its not low on coolant, then the float inside the tank is sticking. Remove the resevoir tank and clean it our with hot water and dish soap. 9 times out of 10 this frees up the float and you're good to go.

Also Saturn S-Series with the SOHC have head problems, DOHC's usually dont unless they're abused.

Jun 29, 2009 | 2000 Saturn SL

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