Has anyone had the code U11B9 issue which shuts the truck down and unable to start
 

2015 Ram 3500 6.7L Laramie SRW mega cab

Lost Communication With RF HUB

Shouldn't have anything to do with the truck starting. (RF is radio frequency.)

This is the code each time the truck shuts down from my bully dog. I clear the codes and the truck runs good for a bit then will shut down again with repeat code.
I am at a loss with this issue. Has happened at the most inconvenient times, ie)
approaching a red light at intersection, attempting to travel through intersection etc.

Any warranty left?

No. I'm sitting at 240K km's.
When the truck shuts down I lose all electronics. No recognition of the fob's, can not lock or unlock truck and can not start until up to 20minutes pass. It almost seems as temperature is a factor as it usually happens after a period of idling or a long drive with a short period of idle.
The truck seems to function good when travelling at highway speed, but am leery on trusting it.
I was supposed to go camping this long weekend and pull my 38' fifth wheel, but am reluctant due to the shutting down at inconvenient times...

Yeah, that kind of behavior doesn't make for a good tow vehicle.

It seems that somewhere along the lines, the various modules are losing communication with each other. If this is something you can induce at will, the dealer may be your best bet at narrowing it down...... I just don't know enough about the newer trucks to be much help.

Never happened to mine

maybe bully dog is suspect

Has anyone figured this issue out? I have a raceme ultra and getting the same code popping up every time.

Hi Joshura Dunn,
I see that you are looking to your fellow forum members for advice, however, if you decide to have your dealer address this, please send our team a private message and we would be happy to connect you with a case specialist to assist you throughout this process!
Alex
Dodge Social Care Specialist