DTC U1073: Bus Off: Notes
WARNING: This page is about a different car, the 2004 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
If DTC U1073 is set in the combination meter, always diagnose the CAN bus lines.
CAUTION:
Whenever the ECU is replaced, ensure that the communication circuit is normal.