Question about 1997 Oldsmobile Cutlass Supreme

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Low coolant lights stays on

Low coolant ligt comes on when started and remains on? the coolant levels are correct when the engine is cold and remain within specs when in operating temp. Is the sensor bad?

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  • Anonymous Mar 27, 2014

    light comes on,coolant level okay

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  • Oldsmobile Master
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It is the sensor that causes this problem, very common, sometimes cleaning it will work, worth a try before u spend $30

Posted on Feb 20, 2009

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Why would the oil light stay on?


That depends on the type of oil warning light being displayed. There are 2 types of warning lights

1. Low oil pressure light which all cars have
2. low oil level light which some cars have.

Low OIL PRESSURE warning means the oil pressure is below minimum and when this happens there will be insufficient lubrication of many engine parts because sufficient oil cannot get to all parts of the engine it is required to lubricate. Until the cause is identified and rectified the warning light will remain. If you run your engine with low oil pressure you will cause expensive damage to internal engine components.

Low OIL LEVEL warning means the oil in the sump has dropped to a dangerously low level (which may be due to an oil leak or abnormal oil consumption by the engine.) This warning means the oil level needs to be topped up and the warning will stay displayed until you top up the oil. Running the engine with low oil will cause expensive engine damage.
Since it is a 2 minute job, Oil levels should be checked fortnightly as a minimum, together with radiator coolant and power steering fluid levels, if you run the car most days each week as most people do.

It is possible for a warning light to remain displayed when the cause has been dealt with because there is a problem with the sender unit. However it needs to be established with alternative checks that the problem has been fixed before investigating if there is a problem with the warning light itself.

Nov 21, 2015 | Cars & Trucks

1 Answer

I have a 2003 BMW 325ci. The low coolant light came on, but the coolant level is at normal. The temp gauge has only went into the red once, causing the red light to come on, but it only stayed in the red...


Tough to say without a fault code read out. There was a nice service information bulletin about your instrument lighting up like a christmas tree that lead to an engine harness. Your thermostat could also do that. As long as your check engine light NOT on and your coolant level is good, then you should be ok to drive on it. While a jammed thermostat will sometimes not set a fault, it could over heat your engine. With the vehicle COLD, try opening the expansion tank then starting the vehicle, if you see a small jet of coolant then your water pump is good.

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Low coolant light stays on when there is plenty of coolant


Try to reset the computer by removing the + battery cable from the battery. Wait at least 30 seconds and re-connect. Check to see if problem is corrected. If code remains replace the sensor in the coolant canister.

Jul 07, 2012 | Cars & Trucks

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How do i remove engine coolant cap on 2001 cadillac dhs


WAIT UNTIL YOUR ENGINE IS COLD,YOUR RADIATOR PRESSURE CAP IS LOCATED ON THE COOLANT OVER FLOW RESERVOIR, THATS WHERE YOU ADD COOLANT WHEN COOLANT LOW,YOU POUR COOLANT IN THE OVER FLOW RESERVOIR UNTIL COOLANT LEVEL REMAIN AT FULL COLD MARK DONT OVER FILL OVER FLOW RESERVOIR, WHEN COOLANT LEVEL STOP DROPPING WHEN ADDING COOLANT AND COOLANT LEVEL STAY AT COLD MARK ON THE RESERVOIR YOU RADIATOR HAS THE CORRECT COOLANT LEVEL IF COOLANT LEVEL KEEP DROPPING CHECK FOR COOLANT LEAKS AROUND RADIATOR AND THE TOP AND BOTTOM RADIATOR HOSES, LOOK FOR COOLANT LEAK AT WATER PUMP GASKET OR SEAL OR LEAK AT WATER PUMP WEEP HOLE IF YES REPLACE WATER PUMP.

Oct 23, 2011 | 2001 Cadillac DeVille

1 Answer

A light come on with a box with arrow pointing down looks like waves what does it mean


This indicates a low level of coolant in the coolant bottle/resevoir..... this symbol represents the radiator or coolant system liquid level.

Warning comes on to warn of coolant level too low.

When the engine is cold...remove the cap and check level. Add 50/50 antifreeze/water to level indicated on the side of the coolant bottle or tank.

Reservoir Bottles/tanks are usually transparent and you can see the coolant level through the plastic.

When coolant topped off to correct level, lamp will go out automaticly...no need for scanner or shop to turn it off. It will come on as a 'self check' when you turn on the ignition and if level is okay will go out when engine starts.

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Coolant is full with correct solution mixture but coolant light comes on and off randomly


sound like you have faulty low coolant level sensor in the coolant expansion tank.make sure coolant expansion tank has coolant should be on full hot mark when engine hot been driven.cold engine coolant level in expansion tank should be on full cold mark.

Apr 15, 2011 | Saturn Ion Cars & Trucks

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LOW COOLANT LIGHT COMES ON SOMETIMES AND TEMP GUAGE SHOWS ENGINE GOING TO OVERHEAT. HEATER GETS COLD. IS IT THE THERMOSTAT?


There may be a thermostat problem, but your symtoms indicate low coolant level. When coolant is too low, it will not circulate, so you get no heat in car, and the coolant remaining in engine block overheats because no cool fluid coming in.
You need to fill the system up properly then look for leaks.
With cold engine, open radiator cap. Fill with antifreeze directly in radiator. Start engine, top up rad if level drops. Put heat control on Hot. Fan on low, heat on high. Gently rev engine and top up rad as needed. IF as engine heats up, it starts kicking fuild violently out of radiator, then the thermostat is bad. if not, then recap radiator, top up overflow bottle and you're done. Look under car for any sign of leaks. Steady dripping indicates a leak, then address that.

Feb 27, 2011 | 1998 Chevrolet Monte Carlo

1 Answer

On a 2002 Buick Century with 3.1 liter motor. "service engine soon" light remains lit. Last week it was the "low coolant" Light that stayed lit. Had a new coolant sensor installed and problem still...


No you need to have the vehicle scanned for the check engine light to see what the code is that has it on. Autozone will do this for free.

May 17, 2010 | 2002 Buick Century

1 Answer

1990 Regal Coupe 3.1 engine. Low Coolant Light Stays Lit


This is a COMMON Problem that GM had with the Level Sensor Curciut, And they Never Correctly Addressed it. I Have on ocations Replaced the Sensor and that Corrected the Problem, BUT Other times the Light STAYS ON No matter What, I have tracked the Wires and all I Have Ever Found was the Plug Being FAULTY. So if A NEW Coolant LEVEL SENSOR Does NOT Turn off the Light, try Replacing the PLUG Itself.

Aug 26, 2009 | 1999 Buick Regal

1 Answer

Low coolant level light stays on though it is full?


There is a coolant level sensor located in the radiator on the engine side of the radiator. It has (1) single wire connecting to the sensor. There is a very high possibility the sensor has lost its calibration. The sensor is not very expensive. Allow the engine to go cold, don't want you to get burned. You will have to drain a small amount of fluid when you change the sensor It sounds like you have verified the fluid level in the radiator and it is good.
Oh, and make sure it is connected before you change it.
Good luck and let me know.
Regards,

Feb 20, 2009 | 1996 Pontiac Grand Am

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