After driving around an hour, some in light rain, DIC flashed a message 'Charging System Fault, or Low maybe" I think, but as the engine power totally went to zero, I was too busy moving off the highway. Then, all of a sudden, power came back to normal. Dangerous as hell, especially on a freeway. Only code is the U1255 thing about serial buss loss, but that's a history one. Take it to the dealer? Everything looks fine, battery, alt., voltage, etc.