I picked up one of those hand scanners to check the codes because I would get the 0514 & 0071 in the spring & fall. So far just once this fall. The scanner from an autoparts store was less than $100. You can clear the code but 2-3 days its gone anyways. Personally I think it's pretty good the truck can detect that type of temperature change. It is hard to ignore a CEL and the "ding" every start up. I just make sure it is the air codes then ignore it, FYI.