overhead outside temp indicator
 

My outside temp indicator has started reading way too high - like 125 when it's 90 and 41 when it's 15 degrees out. Where is the problem and is it correctable? It's more of an annoyance than anything but I would like it fixed. I have an 06 T&C Touring.

First things first....Make sure your english/Metric settings are correct.

Now, ...In your front bumper, look in the lower cutout, and you will see a small black sensor,Clipped to the bottom of the radiator. Make sure its plugged in, and not damaged.

Then....Disconnect BOTH BATTERY CABLES....count to ten, touch them together, then reinstall them.
Also Possible is communication failure between the Overhead controller and other modules in the car, but we'll get to that later.

overhead outside temp indicator
 

I performed the operaton as described and I thought Success! it worked! But then over time the temp crept up to pre fix levels. I wonder if the sensor has been incorrectly attached at the radiator and is warming up with the car? I didn't see it through the opening that you describe.

Sorry, Its behind the front bumper cover,on the lower radiator support, just to the left of center. You will be able to see it from under the car.