i have a high temperature in my car as well, i don't get the overheating message but when i see the temp via hidden OBD it going between 90 deg to 105 deg but when i open the heater with the highest temp, the engine temp go down to 77 deg, so i don't know if the problem is from the temperature sensor or from the thermostat or from something else??? the fan also is not working when the temp go high.

 

Checking in to see if you figured out your problem? I've been lurking and searching the internet for this same issue to get answers.

I've been having the same problem. Mine overheats daily i am watching the temp via hidden menu (OBD). I have changed thermostat so far and nothing changed. Fan blows on high as soon as i start the car in the morning and its been sitting all night. Have a new temp sensor and going to change out today.

 

My DME is shorting out according to the GT1

 

Finally got around to changing my oil level sensor as there is a TSB on this that it can short out. Will have a 100 mile update soon