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Low coolant light - A4 Audi Cars & Trucks

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Check to see if you are in fact low on coolant to start with. If not, then the sensor in your coolant bottle that tells the car how much coolant it has may have failed or become disconnected. Check/clean the connections then try again. If it still says low coolant, then the sensor needs to be replaced.

Posted on Feb 08, 2014

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I just changed the water pump, replaced the coolant, no leaks and now my low coolant light keeps flashing it's not low is this normal?


Low coolant light came on--Holy ****! - 1999-2006 & 2007-2013 ...

www.gm-trucks.com/.../51843-low-coolant-light-came-on-holy-****/
Apr 22, 2006 - 13 posts - ‎10 authors I was driving down the freeway today and got a "low coolant" message. As you can ...Bob 2000 Ext cab Silverado 4x4 w/ 5.3. Back to top ... 2002 Silverado Battery light and low voltage on gauge ...
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Sep 12, 2015 | 2000 GMC Sierra

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Why is my1997 chevy lumina low coolant light is on and the radiator is full of coolant ?


In most newer chevys, the coolant reservoir is part of the pressurized system. Rather than just holding overflow coolant and relying on the radiator pressure cap to draw from and expel to the reservoir, it is an active part of the cooling system. On these systems, there is a coolant level switch in the reservoir. This will activate if the level in the reservoir gets below a certain point. So it is possible to have a full radiator and still get a low coolant light. Be advised that as the reservoir ages and get stained, it is not uncommon for the low coolant sensor to give false indications of low coolant.

Sep 06, 2014 | 1997 Chevrolet Lumina

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The low coolant light is on


If the low coolant light is coming on, there could be a leak in the cooling system and the system may be very low. Sometimes if the cooling system is full and there are no leaks, the low coolant sensor might have a malfunction and turns on the low coolant light.

Oct 15, 2010 | 1998 Buick Century

2 Answers

My car turns the light low coolant and when i turn it on it comes like smoke. i put antifreese again. but it keeps showing the ligth low coolant


I dont remember the lumina having a low coolant light.

It does have a low washer fluid light though.

You can see if you coolant overflow bottle is full. If it isnt, fill it to the hot or cold mark on the side.

Fill your windshield fluid too and see if the light goes out.

Good luck and be safe!

Dec 12, 2009 | 1999 Chevrolet Lumina

3 Answers

Coolant level low light comes on and coolant level is not low in reserve tank or radiator.


There is a TSB for this problem. Here it is.


Bulletin No.: 04-06-02-007

Date: August 11, 2004

TECHNICAL

Subject:
Low Engine Coolant Level Indicator Always On (Diagnose Low Coolant Level System Operation/Check Sensor for Oil Contamination)

Models:
2000-2002 Buick Century, Regal
2000-2001 Chevrolet Lumina
2000-2002 Chevrolet Impala, Monte Carlo
2000-2002 Pontiac Grand Prix
2000-2002 Oldsmobile Intrigue


Condition

Some customers may comment that the low engine coolant level indicator is always illuminated.


Cause

The cause of this condition may be due to engine oil contaminating the coolant. Possible sources of oil contamination are internal engine leaks, improper service procedures, or the addition of some types of anti-leak additives to the cooling system. Once in the coolant, the oil leaves deposits on the level sensor creating an insulating film. This film results in a false activation of the coolant level indicator.


Correction

Diagnose low coolant level system operation and check the sensor for oil contamination using the procedure listed below.


Important: No coolant supplements should be used in GM cooling systems, other than what is approved and recommended by GM. The use of "aftermarket" over-the-counter sealing and cooling supplements may affect the operation of the low coolant level sensor. Discoloration of the coolant recovery bottle is normal and does not necessarily indicate that coolant contamination is present. Flush cooling system only when instructed by this bulletin.

1. Verify that the coolant is at proper level in the radiator and the coolant recovery bottle. If the coolant is low, add proper amount of 50/50 water and DEX-COOL(R) mixture. If the low coolant light operates properly, diagnose the cooling system for loss of coolant as outlined in SI. DO NOT proceed further with this bulletin.

2. Remove the low coolant level sensor. Refer to Coolant Level Module Replacement in the Engine Cooling sub-section.

3. With the key on, the engine off and the coolant level sensor disconnected from the vehicle wiring harness, observe the low coolant light:


^ Light is on - Chassis wiring or instrument cluster concern. Follow the appropriate diagnostic information in SI.

^ Light is out - Proceed to Step 4.



4. With the key off, connect the coolant level sensor into the vehicle's wiring harness. Connect a ground wire (1) to the battery negative terminal. Using a sharp probe (3) attached to the ground wire, ground the coolant sensor probe (2) as shown in the illustration. Make sure a good contact is made. With the key on and the engine off, observe the low coolant light for at least 15 seconds.


^ Light is on - Replace the low coolant sensor and re-check system operation.

^ Light is out - Proceed to Step 5.


5. Using a small wire brush or emery cloth, polish the low coolant level sensor probe to remove any film or oxidation. The probe should be a bright brass color when finished. Use Brake Parts Cleaner to flush removed deposits from the low coolant sensor probe. Re-install the low coolant sensor into the vehicle and proceed to Step 6.

6. Flush the cooling system and install new DEX-COOL(R) mixture as outlined in the SI. Check the vehicle's warranty history to determine if any engine gasket had recently been changed. If there has not been a recent gasket replacement, locate and repair the source of the engine oil contamination.


Oct 31, 2009 | 2002 Chevrolet Monte Carlo

1 Answer

Low coolant light comes on coolant full ??


the low coolant light sensor is defective replace the sensor, it is part of the coolant recovery tank

Sep 30, 2009 | 2001 Mercury Sable

1 Answer

Low coolant light always on


Low coolant means just that, find out if the system is really low or the light is receiving a false signal from the low coolant sensor, just check the level in the coolant recovery tank and the make sure the radiator tank is full, if you are low on coolant then check out why, a leak is probable, most likely a water pump or hose related issue, and no a bad thermostat will not in itself turn on the low coolant light unless the engine boils over and the system becomes low. Remember never ever open a radiator cap on a hot engine, you would be surprised how many professional mechanics get burned this way, be careful..

Aug 09, 2008 | 1996 Ford Taurus

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