DTC U0401-68: Error Signal Received From Pcm [DSC HU/Cm]: 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.

System malfunction location	Error signal received from PCM
Detection condition	The DSC HU/CM receives the error signal from the PCM (CAN BUS No. 1 or CAN BUS No. 2).
Fail-safe	Refer to "DTC Table" and "Fail-safe Function Malfunction Contents Table". (See DTC TABLE [DSC HU/CM (US)] .)
Possible cause	DTCs are stored in the PCM. PCM malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable