Question about 1999 Mercury Cougar

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Why is my add coolant light on ?

My add coolant light is on but my reservoir is full and my temperature gage is reading normal. What is my problem.

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Check the level in the radiagtor, and you may have a small leak.
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Posted on Jul 15, 2013

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SOURCE: coolant leak but temperature is reading normal

a leak is a leak shouldn't run hotter unless its very low

Posted on May 31, 2012

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1 Answer

Why is my add coolant light on


your coolant light is on because there is not enough coolant in the radiator. When the coolant is hot it expands and the excess water is pushed out into the reservoir and as it cools down the water is sucked back in and so keeps the top tank of the radiator full. However if you have a leak or a faulty radiator cap the water comes out ok but instead of sucking back in water it allows air in instead. Therefore you have a one way circuit of water out but no water back in. Your coolant light is telling you to check out the fault before you over heat the engine

Jul 15, 2013 | Cars & Trucks

1 Answer

Camry 96 model overheating


-Is your car running fine and just over heat...?
Here there are few things that need to check:
Q:-Is it full of coolant (Water)?
A: -No Add more water untill full and ran your car again.
Q: Problem solve...?
A: -Yes. (You're done)
-No. Go to the next step

-Check the thermostat . Is it function at a certain temperature?
(This Mean take it out from the car and boil it, use a temperature gage
watch when you boil. It start to open at what degree) If not open at all
or open at too hight. Replace it.)
Good one should start open at 180 to 190* (Must be full open)
-If the engine is normal, but the temperature gage keep going up. It could be effect the temperature sensor itselt.

mai Lor

Feb 22, 2013 | 1996 Toyota Camry

1 Answer

I have a 2003 VW Passat 1.8T. When I first start and drive the car, the coolant temp is normal. After a few miles, it will suddenly climb to the red, and STOP check coolant comes on. If I loosen the cap to...


Has coolant level been going down in return reservoir at all, as in have you had to add coolant recently to bring it up to top level? Have you tried running engine from cold, with heater on and let it run up to normal temperature with cap off return reservoir? If not do so, and watch level in reservoir and if it goes down, add as needed until engine running at normal, and not overheating. Allow rad fan to kick on & off a few times before re-installing cap on reservoir. Pay close attention to engine temp while doing this. If it goes high, shut it off and let cool. Be careful, my son's Passat just had overheat problem and turned out to be impeller on water pump ( internally) was spinning on shaft of pump. Thermostat is certainly a consideration if coolant is full, and all air bled out. Keep me posted on what happens when you run with cap off and keep reservoir full. Don't forget, heater on while doing this.

Dec 05, 2012 | Cars & Trucks

1 Answer

Radiator Leaked No Light on Dash boad about it


check the radiator censor making sure that the wires for this have not come off is there any fluid on the road when its been left for a few hours normally a car loses water any way may be half a pint a month or so this is normall check hoses for splits before forking out for a new water pump

Aug 24, 2012 | 2002 Kia Spectra

1 Answer

I just bought a 2001 caddy catera yesterday, I have a 2 year warranty. I'm going to take it back tomorrow to the dealer to have it fixed. I was just curious the little light on the dash is on now the one...


Low coolant level. If the level checks out fine it could be a faulty sensor. The sensor is in the coolant reservoir. Note that the it lights up with initially switching the ignition on. If after the dealer has repaired the fault check that the light still comes on when switching on the ignition. Some less scrupulous dealers will just disconnect it and tell you it is fixed!

Sep 12, 2010 | 2001 Cadillac Catera

2 Answers

Theres a symbol on my dashboard thats been blinking on and off for about a week. Its the same thermometer symbol thats on the temperature gage, but my car isnt overheating and the symbol on the gage isnt...


It may be due to a faulty coolant level sensor - look on the bottom of the coolant reservoir and you should see an electrical harness plugged in. That sensor detects how much coolant is in the system. If you're low on coolant, or if the sensor is malfunctioning, it could be the cause of the warning light. Check your coolant level, add as appropriate, and if it does not go away, look into changing the sensor.

Dec 10, 2009 | 2000 Volkswagen Cabrio

1 Answer

What is the check gauges light


CHECK GAGES light (1) indicates a potential engine failure(low oil pressure, low coolant, coolant overheating) has occurred.
· Check gages and shut down engine. Gages should read as follows: Oil pressure 5 to 10 psi (34 to 69 kPa) at idle; Water Temp gage below 230 degrees (110 C).
· Check engine oil level (Para 2-11) if OIL PRESS gage indicates low reading. Check coolant level (Para 2-11) if Water Temp gage indicates high reading. Notify Unit Maintenance if levels are low.

If CHECK ENGINE light (2) is on, check engine oil pressure gage (3) and water temperature gage (4). If both indicate normal, proceed with mission and then notify Unit Maintenance. If either one does not indicate normal, stop engine immediately and notify Unit Maintenance


Oct 16, 2009 | 1999 GMC Jimmy

2 Answers

Do i need to add coolant to my reservoir if it is empty, 97 chevy suburban


Yes. Before you do, remove cap on rad when engine is cool & top it up too, if needed. Keep an eye on temperature gauge for a day or 2 & coolant bottle level, just in case there is another problem.

May 10, 2009 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

I just bought a 96 mark, message center reads low engine coolant but heat gage remains normal. coolant not low. doesn't seem to hurt anything, just annoying. low coolant sensor location?


Silly question, but have you looked inside the radiator? I asked becuse often coolant is checked by looking inside the coolant overflow reservoir. Sometimes the ovrflow reservoir will look like the coolant is normal, when it's low in the radiator.

Here's a link which will give you more info.


http://www.gminsidenews.com/forums/f53/low-coolant-sensor-location-53810/

May 09, 2009 | 1998 Lincoln Mark VIII

1 Answer

Temperature gage


you are low on coolant and you have brown coolant. need a bypass kit.

tsb 01-11-6. post email and I will send tsb to you.

Jan 16, 2009 | 2000 Mercury Sable

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