DTC U0075-00: Can System Communication Error (HS Can) (TCM) (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 U0075:00 (TCM, EV6A-EL, EV6AX-EL, US) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	CAN system communication error (HS CAN)
Detection condition	Under the following condition, a communication error (HS CAN) occurs: Battery voltage is 10 V or more.
Fail-safe	Inhibits learning control. Inhibits neutral idle control. Inhibits AAS.
Possible cause	CAN bus communication line malfunction (HS CAN) TCM malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable