I've only seen that message once and it was completely off the wall. Sunny day about 25deg and truck had been sitting outside overnight (maybe upper teens). I had done some heavy trailering (in T/H) the eve before and after I dropped the rig in the barn I drove around front to park. Fired it up next morning, put it in reverse and got the message. Thought WTF to myself, shut it off, waited a minute and restarted. Problem over. I chalked it up to a fluke tied to the T/H circuit.