The fan still works then I assume?
My experience with codes like this is that if they pop up and go away, ignore it and don't worry about it. Sometimes gremlins happen (especially on Jeeps), and if the code goes away and doesn't come back, I figure that's exactly what it was... a gremlin.
Just keep an eye on it, but my guess is it won't be back. Happened to me a number of times with other codes that never came back as well.
Gotta love FCA for using sub-par electrical components.