I used to get a similar error on my Monaco coach. I would reset everything by throwing the chassis battery disconnect off and then back on. This seemed to reset the various computers and everything would be fine for the next thousand or so miles. Since I monitored most functions with an OBDII gauge, I just figured that it was a computer glitch and just accepted the fact that this would happen from time to time. In your case, it may never happen again and I would not worry about it unless it starts to happen on a regular basis or unless other gauges verify that there is really a problem.