Question about 2000 Buick Century

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LOW COOLENT light stays on

The Reservoir
is full yet the dashboard light stays on, I suspect a bad sensor, but where is it and how do you change it?

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  • offgrid Sep 06, 2008

    The sensor is located in the middle of the radiator at the top. The shroud has to be removed to get to it so therefore it is labor intensive.

  • offgrid Sep 26, 2008

    Than you for the sugestion, I believe this will do the trick.

  • dwildone Oct 16, 2008

    My 2000 Buick Century "Low Coolant" doesn't go off until the engine starts to warm up (about 5 to 10 minutes of driving) and then it will go off and not come on again (other than normal operation before starts). Entire system was flushed by Buick dealer about three or four years ago due to sludge or mud buildup from the Dexcool Antifreeze Solution. Could the sensor be clogged by this stuff and not get cleaned? Jim in Oklahoma

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The sensor is at the top of the rad next to the battery on the right side: easy to see but not so easy to reach. The sensor may not be defective, but dirty. If the coolant is dirty, it will coat the sensor and cause false readings. To check, unplug the sensor and check to see if the light goes out (allow 15 seconds or so). If it does, then remove and clean the copper probe of the sensor with a scratchy pad and reinstall. If the light comes back on, then replace the sensor. If the light stays off, flush your cooling system and replace with the green stuff: the pink Dexcool is evil.

Posted on Sep 26, 2008

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