Re: 9-5 Engine Light - Saab 9-5 Bulletin Board - Saabnet.com
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Re: 9-5 Engine Light
Posted by David Wright (more from David Wright) on Fri, 18 Feb 2011 14:31:19
In Reply to: 9-5 Engine Light, Paul D., Fri, 18 Feb 2011 05:23:41
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Paul, I think the easiest way to think of this problem is that in 2003 and maybe other years the factory fitted Thermostats had return springs that get weak thus allowing too much coolant to pass through them. Then on a cold day with the radiator coolant really cold the temperature of the engine doesn't get up the what the computer says it should be it the allotted time (20 mins) and so it cuts off the reading to the gauge. As you know restarting the engine when this happens gives you back the gauge reading. After 3-4 times the CEL comes on and tells of a problem that you might care to fix.
Personally I think the sensor is rarely the problem as it has been used forever.
David Wright
posted by 207.144.210...
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