"no bus" means the "bus"( used to let various modules communicate to each other and the PCM) is not working, could be a bad connection behind the cluster, or bad connector completely. i've heard there was a TSB for this problem, not 100% sure as I havnt had this problem.
if it were me, i'd pull the cluster and check all the connections behind it really well and make sure all the blades have good contact.
Temporary fix is to pound the top on the dash until you can get in there. Usually gets them to reconnect.
That or a big bump in the road.
you know, even with my certifications, ive found that through my years of expierience, that there have been very few times that i havnt been able to fix something with a heavy fist, or a BFH lol. it just works lol.
To the OP, what kind of cluster problems are you having? I got the same code, but I don't have any problems. Everything works fine, that's why I ignored it. I'm going to give it a shot in a couple minutes when I head home and see if I still get it a few weeks later.
looking for ground info...my 99 xj has the no bu5 in the od..and i have already gone to a dealer and had the above mentioned sb preformed...didn't change a thing......hit the power door locks to the locked position and hold it there and every thing works,,,map lites seem dim though when you do this..but they don't fuction at all if yu don't hold the pdl in locked position...fuel gauge is the only gauge that operates after you hold pdl in locked position and release it....everything else goes dead in cluster..........
Guys - check your battery or system voltage. A little voltage drop will do this and other weird things. If things make no sense all ways check the power supply - in your computer at home and on the jeep.