Dealer called me around 2pm yesterday, informed me it was the Inverter Power Module. He said it was over $5K to replace it and the parts needed to do it. Then the good news came, it is all covered under warranty. I went through my paperwork, I received a Warranty enhancement notice extending the warranty on the IPM to 15yrs unlimited mileage at some point, but it explicitly states that no action is needed unless there is an issue. He overnighted the parts and could have the vehicle done today. If he cant get it done today, he is going to get me a loaner vehicle at dealers expense. All in all, this is one of the outcomes I hoped for, but didn't expect.