DTC U0164-00: Can Communication: Communication Error To Dash-Electrical Supply Unit (Us): Outline

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0164:00 (PCM, SKYACTIV-G, US) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	CAN communication: communication error to dash-electrical supply unit
Detection condition	Communication error between the PCM and dash-electrical supply unit continues for 5 s or more.
Fail-safe	Not applicable
Possible cause	CAN communication line malfunction between PCM and dash-electrical supply unit Dash-electrical supply unit malfunction PCM malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable