Low coolant warning light comes on

2000 CHEVROLET IMPALA

170,000 MILES • 6 CYL • FWD • AUTOMATIC

TIM9835

MEMBER
3 POSTS

Low coolant light comes on but coolant level is fine, operating temp is ok. Could this be a faulty sensor? If so, where is it and how do i replace it?

Jan 6, 2011 at 5:51 AM

KASEKENNY

✓Experienced Mechanic
18,907 POSTS

Correct. If the low coolant light comes on either because the coolant is low, or it thinks the coolant is low.

So, if your coolant level is fine then we need to suspect the sensor.

I would still pressure test the system to ensure this is not an issue.

https://www.2carpros.com/articles/radiator-pressure-test

However, we need to also check the attached TSB and make sure there is not an issue with oil in the coolant as talked about in the TSB.

Also, I am attaching the location and process on how to replace this if it is the sensor.

Let me know what you find. Thanks

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