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  #1  
Old 13th June 2012
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Default Low Coolant warning but tank full

I'm getting the message that coolant is low but the level is good when I check the tank. Is this due to the coolant sensor malfunctioning? Do I need to replace the whole expansion tank to correct this problem, or is the coolant sensor a separate assembly?

My 97' 900 SE had this very same problem and I never bothered with it.
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Old 13th June 2012
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I'd check the connections on the sensor plug, give it a jiggle and re-start the car.
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Old 13th June 2012
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Quote:
Originally Posted by redrum View Post
I'd check the connections on the sensor plug, give it a jiggle and re-start the car.
Okay. If that's fine then what?
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Old 13th June 2012
BobSaabit BobSaabit is offline
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You probably need to clean the sensor. Take the tank out and use various implements to clean the sensor float and the area around it. You'll probably want to clean inside the tank too using various creative tools once you see how much scum has accumulated in the hidden compartments.

Re-install. If that doesn't do it, you need a new reed switch. That's that part that the connector hooks on to. You can't buy it separately, you have to buy the whole tank...so a junkyard is usually the best source for a replacement.
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Old 13th June 2012
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Thanks a bunch. I'll get on it.
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Old 13th June 2012
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Here's a DIY on replacing just the reed switch. http://www.saabcentral.com/forums/sh...d.php?t=184277
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Old 13th June 2012
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Quote:
Originally Posted by jakejm79 View Post
Here's a DIY on replacing just the reed switch. http://www.saabcentral.com/forums/sh...d.php?t=184277
Great, Jake, thanks!
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