I have a 2012 3500 at the odometer was around 72,000 when this started. I was pulling a 28' travel trailer from California to NY and back, with the truck and trailer loaded with gear, food, water, propane. The truck was serviced by my local RAM dealer the day before the trip.
When I left California, no trouble lights. Around Grand Junction, Colorado my traction control light started coming on and off, with a couple of chimes each time it came on. That persisted for a few hundred miles, mostly staying on and then staying on full-time. By the time I got to Pennsylvania, the Service 4WD message also appeared and was intermittent. There were no other problems with the truck. I stayed in NY for about 18 days. I had the oil changed, fluids checked, etc.
On the way home, same thing. The traction control lamp and Svce 4WD messages were on and off, but mostly on. By the time I crossed the Rockies going west, both lights went off and did not appear for the duration of the trip home.
After that trip from time to time there was an occasional trouble lamp for traction control, which according to the manual, will appear now and then and then shut off. Then I ran my batteries down when I did some work on the trailer (replacing the electric tongue jack, and going up and down several times) and driving to a local campground with no highway miles. I could not start the truck, and the batteries were 8 years old so I replaced them because they did not take a charge from a battery charger. I put in AGM batteries. I have never seen a trouble light since then, but I don't drive it a lot. Now has 79,000 miles.
My conclusion is that the intermittent trouble lamps may have been related to dying batteries. I'm going to take the same trip this year in July so I'm having a shop go over the truck. I also purchased the OBDLink MX+ to view my trouble codes and other details while in route.
