It says no bus. The connectors behind the dash tend to get loose and will drop the connection. Once they seat again the gauges come back online. The best fix I have seen for this is to remove the dash console. Clean the bus connectors thoroughly and squirt some di-electric grease on them. Reseat the dash console firmly. Some people have gone to the lengths of bending their connectors to make sure they are seated properly but I didn't have to on mine.
This is a very common problem so nothing to be concerned about.