I had the ECM replaced 6 months ago by the dealership due to what they called a communication issue by multiple systems. The symptoms were loss of power, and multiple error messages on the dash (park assist off, traction control off, service stabilitrack). Plus, some of the gauges go flat (rpm, gas). The problem seemed to be fixed, but now I'm having the same problems again. Threw a few codes (U0073/P0700). I'm worried that I'm going to lose power driving down the interstate and smashed by a semi, while I'm transporting my 2 year old. I'm taking it to the dealer again tomorrow, but I'm concerned since they seemed so puzzled by it the first time. Anyone else have any experience with this?