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BHP231's Avatar
 
Join Date: Sep 2012
Location: Melbourne, Australia
Posts: 68
Garage
Coolant warning light and jumping gauge

Hi. 997 series II Carrera.
Couple of times recently the gauge for the coolant is stuck in the low number (40) and not moving. The red light to the right of the gauge comes on as well.
Then the light goes out, the needle jumps to the 60 mark and then jumps to the 80 mark where it should be and seems to right itself.
The whole thing take a couple of minutes and has happened twice in the last 4 or 5 drives.
Before taking it to the Porsche mechanic I wondered if anyone had any thoughts.
Thanks. Andy
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2009 997.2 Carrera PDK
1988 Carrera Targa Euro Spec (gone by not forgotten)
1985 944 manual
Old 09-09-2017, 07:59 PM
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Join Date: Jan 2011
Location: Ontario, Canada
Posts: 1,084
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Presume that you are not getting any error codes.
My first guess, low coolant or air pocket in system. I would elevate the rear slightly, open the coolant reservoir, let the motor cool down at least 12 hours overnight. You may have to add some coolant in the morning before closing up the reservoir and starting the engine.
Second guess is a sticky needle. Tap it and see if you get any reaction.
Third guess is a bad or dirty sensor. When was the cooling system last flushed?
Others will, I'm sure, weigh in.
Johan
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2006 C2S, A4 Quattro, Evolution of a Carrera RST.
Old 09-10-2017, 06:27 PM
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Thanks. Tilt and top up seems to have worked.
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2009 997.2 Carrera PDK
1988 Carrera Targa Euro Spec (gone by not forgotten)
1985 944 manual
Old 09-18-2017, 02:13 AM
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