I have now had the car in twice to no avail to get this fixed. First time they said they had to "download new s/w". Latest time they "topped off supercharger coolant". Same problem remains. Warning comes on at intermittant times and the temp gauge always goes to zero when it goes on. Can happen when I first start in the morning or when i am in the middle of a drive. Oil temp is never over 185 regardless of whether the warning is showing up or not. Then unexpectantly it goes back off and the temp gauge starts reading correctly again. I have told the dealer it seems like a temp sensor problem...but they don't seem to listen.
Any suggestions? Any tech bulletins on this one?