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What would cause (low coolant) light to come on. when coolant is full.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: flashing low coolant light

there is a coolent sensor at the top of the radiator replace that sensor that will fix the problem.

Posted on Jan 15, 2009

  • 124 Answers

SOURCE: Low Coolant Light Staying on

This car has sensors on it. If the coolant tank is full and the system is working properly, then one of the sensors is bad.

Have the cooling system presure tested to make sure you have no leaks. If test is good, then look to the sensors.

GM has different systems for each car depending on configuration, so it is hard to point to the one that may be bad.

Posted on Apr 05, 2009

emissionwiz
  • 75077 Answers

SOURCE: low coolant light comes on

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

Posted on Sep 30, 2009

  • 1986 Answers

SOURCE: Low Coolant light comes on, popped hood and

You're mixing coolant and oil. Probably lower intake gasket leak if you're not running hot, otherwise could be head gasket or other issue. Occasionally a cracked core in the radiator will do this too.

You need to have it taken care of, if you have oil in the coolant, you've also got coolant in your oil, the engine will begin to eat itself...

Posted on Oct 16, 2009

  • 2841 Answers

SOURCE: Where is the low coolant sensor

Most of the time it is located in the reservoir.

Posted on Jul 18, 2010

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Hi I've got a moretti elite model and it's not blowing cold air it's second hand and a red light I'd on. It's says water full I don't know anything about them


A little square light with waves on it? It is the low coolant light. Low coolant will cause no heat in the vehicle.

Nov 16, 2014 | Cars & Trucks

1 Answer

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

1 Answer

Low coolant light continues to come on. The coolant is full. Reasons why?


This is a common problem and it caused by a defective low coolant light sensor. The sensor is either located in the bottom of the coolant surge/recovery tank or in the side tank of the radiator.

Sep 16, 2011 | 2002 Jaguar X-Type

1 Answer

My service traction system warning light is on. What causes it? My ABS warning light remains on at all times. What causes it? My low coolant level warning light comes on often. The expansion bottle is...


Most traction systems have sensors at each wheel. These detect wheel spin (can be a loose connection, broken wire, dirty sensor) The ABS won't work for the same reason but your brakes will work fine without ABS. (as long as brake fluid is full) The expansion bottle should have some coolant in it as well as the radiator. My experience is the bottle has a low level sensor that can get dirty ( If it was full) But you seem to be losing coolant? Is the lid on tight? Do you ever see coolant on the ground or in the engine bay? Sorry that's a mystery from here. Hopefully it is not disappearing in your engine. That would be a bad head gasket!

Mar 11, 2010 | 2002 Chevrolet Impala

5 Answers

Low collant light is on and has no leak and is full


This problem is common, if the coolant level is OK, check the "coolant sensor" and clean the plug.

Aug 28, 2009 | 1995 Buick Park Avenue

2 Answers

Low Coolant Light Staying on


This car has sensors on it. If the coolant tank is full and the system is working properly, then one of the sensors is bad.

Have the cooling system presure tested to make sure you have no leaks. If test is good, then look to the sensors.

GM has different systems for each car depending on configuration, so it is hard to point to the one that may be bad.

Apr 05, 2009 | 1996 Chevrolet Cavalier

1 Answer

Low Coolant light flashing on 1996 Buick Regal 3.8


The low coolant sensor should be located in the passenger side radiator tank, You need to take it out and clean the sludge off of it for it to work right. Or you can just unplug it and forget about it, the light will go out and it won't cause any problems.

Mar 01, 2009 | 1991 Buick Regal

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