Rick's Free Auto Repair Advice

Low coolant light on

If you own a GM vehicle and have a low coolant light on but the coolant level is fine, this may be the fix.

You have a low coolant light on and you’ve checked the coolant level. It’s right on the money. coolant level sensorSuspecting a faulty sensor, you decide to replace it. STOP. If your vehicle has the 3.1 or 3.4 engine and you’ve had the intake manifold gaskets replaced, or if you’ve added sealer to the system, you may have contamination on the sensor. To confirm that this is the problem, remove the sensor and clean it with a wire brush. Then sand with emory cloth. The sensor should be shiny. Reinstall and see if the problem goes away. If it does, you will have to flush the cooling system to get rid of the contamination. Or, clean the sensor when it gets contaminated.

 

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© 2012 Rick Muscoplat

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Posted on by Rick Muscoplat


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