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Why is my add coolant light on

My add coolant light is on but the resorvore is full and my temperature gage is reading normal. Why is my coolant light coming on?

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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

Posted on Jul 15, 2013

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Posted on Jan 02, 2017

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SOURCE: ENGINE COOLANT FAN NOT CUTTING IN

On my 2001 Focus Zetec 2.0L, the radiator fan only worked with the air conditioning turned on (as in no low speed - engine would overheat while idling or in traffic, but was fine as long as the A/C was on). The fix was to replace the radiator fan resistor assembly located in the fan shroud between the fans.

Posted on Nov 12, 2008

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SOURCE: 2001 Pontiac Montana Temperature Gage and Fuel Gage malfunction

sending unit or float in gas tank, check if any broken wires or well plugged in and then check the float for the gas.

Posted on Dec 23, 2008

emissionwiz
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SOURCE: Normal coolant temp for 2003 Jeep Grand Cherokee city/highway V6

U should have the accuracy of the gauge tested before u spend any more money on this, factory gauges are not very accurate. U are still in the normal zone though no matter what the other expert says, and jeep Cherokee's run hotter than 195 due to how small the engine bay is, my friend and fellow tech works for a jeep dealer and says hot running on V6's and overheating esp on the V8's is a common issue even on new trucks.

Posted on Mar 13, 2009

  • 30 Answers

SOURCE: Check Coolant / STOP lights

If the coolant level is low in the expansion bottle then the light will come on and you need to locate the leak. If the bottle is full then the level sensor in the bottle is bad!

Posted on Aug 14, 2009

  • 1 Answer

SOURCE: Engine temperature gauge reading on

I have the same thing happen to me. have 2004 GMC Serria 5.3, Engine is not hot. gauge now pointing down - straight down. replaced engine sensor but did not fix problem. I now believe it is the gauge. still troubleshooting. Initial problem indicated a rise in tempature, so I stopped and looked at engine, not hot- plenty of water, hose can hold, drove around some more, then gauge started to climb, stopped again had mechanic check, he had heat sensor and checked engine temp, pretty normal. suspected sensor so replaced. when engine is cold still gauge points straight down.

Posted on Jan 08, 2010

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When I jump in my car in the mornings cold engine and turn on the key without starting the engine the cooling fans come on outside temp is only 60 degrees.


U need a shop manual for tests. A scan that reads data will also target problem. If car is not overheatin or othr then u can kinda relax

Aug 10, 2015 | Cars & Trucks

1 Answer

When I jump in my car in the mornings (cold engine) and turn on the key (without starting the engine) the cooling fans come on (outside temp is only 60 degrees).


-No not to worry about it if your car never over head.
-No you can't get any reading if the temperature is at your thermostat's setting or below.
-It connect or (Works) ONLY when the temperature at that area reach above the thermostat setting or up to 200 degree or higher.

Good luck


Mai

Aug 10, 2015 | Cars & Trucks

1 Answer

Why is my add coolant light on ?


Check the level in the radiagtor, and you may have a small leak.
Launch X431

Jul 15, 2013 | 1999 Mercury Cougar

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

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

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

5 Answers

Temperature gage not working,gas,gears gage are ok.


located the temp sending unit check that its pluged in, if it is unplug it and ground the wire to something metal (with the switch on) and see if the gauge moves if it does then your temp sending unit is bad and needs replaced

Aug 01, 2009 | 2004 Pontiac Grand Prix

1 Answer

My check gage light is on what do i do help!!!!!!!!!!


A "check gage light" typically indicates a faulty reading on one of the gages located on your instrument cluster. After starting your vehicle, observe your instrument cluster if one of the indicator needles on the instrument cluster remains all the way to the left or "pegs" out all the way to the right, it may be the cause of your fault. The exception is the coolant temperature gage it will take 10 to 15 minutes after which the needle should rise to a normal position. Correcting the "faulty gage light" will depend on which gage is malfunctioning. Once you have figured out which gage is causing the check gage light to illuminate, then we can proceed to correcting the problem causing it.

Feb 21, 2009 | 2002 Ford Explorer

1 Answer

Fan turns on and off all the time


It is normal for the fan to cycle between on and off even though the temperature gage reads normal.
Anytime the coolant temperature rises by approximately 10 degrees above the normal operating temperature the fan cycles on but you won't notice the gage show that small of an increase.

Jan 07, 2009 | 2003 Ford Escape

1 Answer

ENGINE COOLANT SYSTEM NOT FUNCTIONING PROPERLY


1. Check the level you filled the coolant to...If you overfilled it this will happen. 2.  Did you add the correctly diluted antifreeze? 3. Check to be sure the radiator is unobstructed

Jun 07, 2008 | 2002 Ford Taurus

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