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Gary, Australia Car Mechanic
Category: Australia Car
Satisfied Customers: 1127
Experience:  Senior Technician
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The coolant light comes on after 93% level correct & f

Customer Question

the coolant light comes on after 93% level correct & f
lowing no switch expansion tank appears not boiling
Submitted: 1 year ago.
Category: Australia Car
Expert:  Gary replied 1 year ago.

Hi there,

Your Astra could have one of many problems.

Can you tell me whether there is a module mounted behind the LH foglight? If there is, it is the cooling module.

There could be a wiring fault.

You could have a bad thermostat or water pump.


Customer: replied 1 year ago.
thank you for your advice Gary those were my thoughts I needed to be sure (water pump replaced 3 months ago) I do not wish to keep you on line again many thanks.Cheers Ray
Expert:  Gary replied 1 year ago.

Hi Ray,

The coolant temp data appears in the ECM data and the cooling module data.

If they conflict each other, the light comes on.

Hope this is of some help.