Outside Temperature Sensor

#1
First time Toyota owner here. Searched for maintenance required light fix but decided to change my oil instead. I have had a minor annoyance however that has bothered me ever since I first bought my car a couple of months ago. Any advice on fixing the outside temperature sensor? I would like to have this feature enabled, but instead, I have two dashes. Is this something a novice can attempt to fix or this something I would be better suited to leave to someone at the dealership?
Thanks for all help!
 
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