DTC U0001: High Speed CAN Communication Bus: Action
WARNING: This page is about a different car, the 2018 Lincoln MKX and 2018 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
A HS-CAN fault was present at a point in time. The fault is not currently present since the module is communicating with the diagnostic scan tool. CLEAR the DTC. REPEAT the Network Test with the diagnostic scan tool. VERIFY the integrity of the connectors and wiring. Refer to Module Communications Network in OEM Wiring Diagrams article, for schematic and connector information.