Most commonly, this is a faulty Outside Temp Sensor. Check the wiring harness for broken or loose wires. If the visualy inspection checks ok, suspect a possible faulty sensor. This sensor is located behind the middle of the front bumper, and should be a fairly easy job for a DIY'er.
Finally got back to this project. Found it exactly as shown in the picture. Now, how do I get it out so I can take it to the dealer for replacement? (or this available at a regular auto parts store?)
Can it be removed from the front of the vehicle through the grill? I'm afraid to tug or twist as I don't want to damage the holder.
Is it easier if I remove the cover under the hood between the radiator and grill? This probably give me a better view of how it's attached. Thanks.
This part should be available from a local parts store, not nessacarily a Dealer-only item.