Just had a concerning issue that has never happened before. I was in a local store for about an hour, and when I came out and started the truck, it started, and almost immediately stopped. When I tried to restart it, it took quite a few seconds to turn over, than started. It idled very low, and finally picked up rpm's after I gave it some throttle. Then it ran at a high idle for about 30 seconds, with the cooling fan running. Finally, it settled down to a normal idle, and the cooling fan shut off.
What could this be? Has anybody experienced this issue? There were no fault codes showing. This is a 2011 Ram Hemi Crew Cab 4X4.