I have had 2 occasions in the past few weeks that at the exact location when I was accelerating on a freeway entry ramp and all of a sudden my coolant gauge shot up to maximum and the display showed a coolant warning message, but as I straightened from my turn everything came back to normal. It all happened and resolved within a few seconds. Since then I was not able to reproduce the problem. I checked the coolant level and it was at maximum. Recently, there was a vacuum pump service campaign done on the car. Anyone has any ideas? Loose connectors? Faculty sensors? If the vacuum pump had stopped momentarily, would it cause the coolant temperature to rise to maximum within a few seconds?

 

would all just be guessing
get the car in and checked out


good luck

let us know

 

Taking the car to the dealer next week, will report back.