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Discussion Starter · #1 ·
I have a 99, 9-3 with 85,000 miles and in great shape.

The coolant light came on yesterday, and has been coming on intermittently.

The coolant levels are full, and the engine temp is fine.

Should I be concerned?

I'm reluctant to spend $100 for a diagnostic unless it's necessary.

Thanks.
 

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Chances are, the sensor on the tank has crapped out. You can unplug the sensor and connect the two pins with a piece of wire. If that keeps the low coolant message from coming on, then the sensor is bad. Unfortunately, Saab doesn't sell the sensor separately and you have to buy a whole new tank, but you should be able to find one fairly cheaply on eBay or Car-Part.com--Used Auto Parts Market.
 

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I have a 99, 9-3 with 85,000 miles and in great shape.

The coolant light came on yesterday, and has been coming on intermittently.

The coolant levels are full, and the engine temp is fine.

Should I be concerned?

I'm reluctant to spend $100 for a diagnostic unless it's necessary.

Thanks.
Known problem/design issue/learn to live with it or splice wires.
Is it more common when the engine is cold? If so, try adding a little more coolant
 

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Used tanks are easy to find in junk yards - pull a few, one is bound to work! I have one in my garage as a spare myself. Also good to have a spare coolant cap on hand too - they can go bad and cause the tank to boil over and create a mess. I have had a few of them go bad over the years - so I also keep a few of them on hand.
 
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