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Fault indicator Coolant gauge

  • 2009
  • 911 Carrera S Cabriolet
25 000
Electrical and Electronic
Jenkins Township, 

I have a 997 Gen II Carrera S Cab.  Recently,  I have noticed that first thing in the morning after driving the car for about 1-2 miles, the coolant gauge acts "jumpy" and then I get a Coolant Fault Indicator on the dash.  This goes away in seconds and the coolant gauge makes it to 175 without any trouble.  It never goes above 175.  There is no coolant leaking out of the car. It does not occur for the rest of the day.

Is this a low voltage issue since the car has been on a battery maintainer for the winter or is there a temperature sensor issue?




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