Check Engine light this morning

[Yetti]

well we have had some weird weather. the temp rose to 60* this morning after my truck sat in the barn and was chilled to the bone from the weekend. well when I started it it set a light in the dash. so at lunch I spun into the dealer and grabbed the Tech II and ran the code. come to find out it had an Evap code cause the weather changed to fast. the same thing happened last year. just cleared the code and it was fine. so if by chance you get a light after a severe weather change in temp or Baro pressure it will most likely be the evap code.