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What does a coolant level sensor do?

Updated: 10/20/2022
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18y ago

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Warns you when the coolant level is low in the reservoir. I own a 98 Venture and had the low coolant warning light come on. Come to find out that most V6 engins have a potiential lower intake manifold proble which in time will have to be replaced. Dealer cost without warrenty.....$1200-$2500.

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18y ago
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Q: What does a coolant level sensor do?
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What causes the check coolant light to come on and off?

Coolant level low or level sensor malfunction.Coolant level low or level sensor malfunction.


Does the coolant level sensor turn the fans on?

No, the electric cooling fans turn on and off by a signal from the coolant temp sensor. The coolant level sensor only illuminates the low coolant light when you are low on coolant.


Does the coolant sensor need to be replaced if there are no leaks and the coolant level is fine?

Only if the sensor is malfunctioning.


How do you replace coolant level sensor?

It is in the passenger side coolant tank on the radiator. If the light is on and the coolant is at the proper level then the sensor is defective. To replace it you will have to drain the radiator. Disconnect the wire and remove the clip and remove the sensor.


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The coolant level sensor is on the bottom of the coolant reservoir located on the passenger side fender well.


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1997 JGC Laredo You have had the coolant sensor replaced but it still tells you that the coolant level is low does the computer need to be reset If so how is it done.?

There are two separate sensors that play here. the "coolant temperature sensor" and "coolant LEVEL sensor". I suggest confirming which of these was replaced, as it is very common for them to be confused. likely you will find the coolant sensor that was replaced was the one on the engine (temperature); The LEVEL sensor is mounted either in the coolant resivoir or in the radiator. Probably just need the proper sensor replaced.