When Monitored:
WARNING: This page is about a different car, the 2012 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.
U0002-CAN C BUS OFF PERFORMANCE not present. One second after ignition on and not in Park or Neutral, no System Overvoltage or System Undervoltage condition present, or the transmission in Park or Neutral and engine rpm greater than 850 rpm.