When it gets down to 37 degrees out, I get a message on the screen that says something like, "Caution, it is freezing out and conditions may be icy." It always does this at 37 degrees. When the temp is lower out, at freezing, no message. Also, when driving home tonight, the temp was 37 degrees and about 5 minutes later, it read 29 degrees on the dash and it fluctuated up and down a degree on the rest of the trip home. It is actually was about 37 degrees out and is still. Would this be a faulty temp sending unit? If so, where is it located? Kind of wondering if the Lacrosse may have more than one temp sending unit. Thanks.