DTC U0401-00: Signal Error From Pcm (Electric Power Steering (EPS)): 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 U0401:00 (ELECTRIC POWER STEERING (EPS)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Signal error from PCM
Detection condition	Error detected in signal from PCM via CAN communication
Fail-safe	Refer to "Fail-safe Function Table". (See DTC TABLE (ELECTRIC POWER STEERING (EPS) (US)) .)
Possible cause	PCM malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable