(Not a A-Body) 2001 Dodge Ram Truck "No bus" Code, Anyone!?

Dreaded "no bus"...Was PCM for my kid's 2000 Durango. Good bet that's what it is. Sorry to say that based on my experience you will try SEVERAL from the people who sell these as "rebuilt" on Ebay before getting one that actually works, and this is assuming that they don't lose your order or lose track of the 3 or 4 bad ones that you return, causing you to have to make a phone call each time. All of this happened to me and with 2 different sellers.
This was probably the worst auto parts experience I have ever had and it caused the truck to be down for weeks.
My guy strongly suggested that I get a genuine Mopar reman. I resisted and resisted, and went through 6, yes 6 of them from the other guys before finally breaking down and going to the dealer (list price 700+). Truck was back on the road without another computer related problem the minute the Mopar one was installed.
I'm trying to sell it now on Ebay since the torque converter is fried so I'm done with the Durango after dropping 2k on this whole computer thing last summer. Sorry to vent and I wish you better luck. BTW these things are said to be very "part number intensive" so I don't think the one I have will work for you, but if-so I'll make you a good deal on it. It is listed now for 400 dollars.
I suggest maybe try 1 from the other guys and hope you get lucky but if that one fails cut your losses right there. Also, some were bad right out of the box
(tested hot&cold?????) and others failed a short time later. My guy claims that for whatever reason the Dodge truck PCM's are all but impossible for the rebuilders to fix correctly, but not so for other vehicles, that's why their feedback is so good.