"Wait to start" light flashing
 

Went to go fuel up my truck today, got about a mile from the gas station and the WTS light started flashing. First time it has done that and the truck was running great as usual. Shut the truck down to fuel up, once I was done the truck started right up then the WTS light started flashing right when I pulled up to my drive. I only live about 5 miles round trip to the gas station. Is the Air intake temperature sensor bad or just dirty? I obviously haven't checked it but have read a little bit about it. Would anything else cause this?