P206D code refers to your DEF system. It could be the DEF injector is clogged, or the system thinks you are using bad DEF, or a short in the injector wire. This system will be covered by the new service agreement once you accept the settlement with FCA and let them install the new software programming. The steps I would take are:
1. Drain or siphon the DEF tank and refill with fresh Walmart Supertech DEF. Then remember there are date codes on DEF boxes.