Question about 1992 Buick Century

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Low coolant light

My buick century 2002 the coolant light will not go off and it is not low on coolant.

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  • Anonymous Mar 15, 2014

    Loosing coolant

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In the surge tank, there is a sensor that detects the level of the coolant. It's most likely the sensor is stuck on the low position. All this sensor does is slide up and down as the coolant level goes up and down. You can tap the side of the surge tank near where the sensor plugs in and see if it will dislodge. You'll see the 2 wire plug at the bottom of the tank towards the front.

Posted on Jun 13, 2008

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Posted on Jan 02, 2017

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1 Answer

I have 1 2002 buick centery the low coolent light was blinking red but its not low now its solid red and over heats on idel only


Not low in the recovery bottle or
coolant system, when you check that

That doesn't tell you much

You have to diagnose the overheating issues

Stop using it until resolved

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Hello jameli_noman: My name is Roger and I will help you. The radiator has a sensor in it that is supposed to since low coolant. A couple of things can cause a problem. 1. The sensor is working and coolant is low. 2. Coolant sensor is defective. 3. Coolant sensor is contaminated by oil deposits. I would look at #3. If you were low on coolant? The coolant had to of gone somewhere. Look close at the corners of the intake manifold. Where the intake meets the cylinder heads. If you see what looks like a slimy oozy build up and you should see traces of coolant in this mess. You have a intake gasket causing the problem. This leak will let minute amounts of oil into the coolant system. This will cause the sensor to be contaminated. You can disconnect the sensor. But this defeats the early warning of low coolant and engine damage. Should you have any more questions please just ask. I will reply. Please rate the answer as this way I know it was of use. Thank You for using Fix Ya. Roger

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2002 buick century low coolant lite on


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