I have had the P0410 error for a while with the Check Engine light turning on and off. I took the advice in this thread and got a new Relay Control Module and Check Valve from the dealer. Problem Fixed!!!

The good news is that I belong to the North Georgia Mopar Club which is supported by the dealer. Got the Relay module for $200 (List $304) and the check valve for $17 (List $25). Thanks to everyone who contributed to diagnosing the problem.