DTC U0401-68: Error Signal Received From Pcm: Notes

WARNING: This page is about a different car, the 2013 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Error signal received from PCM
Detection condition	The front body control module (FBCM) receives error ECT sensor or ambient temperature sensor signals from the PCM for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe	-
Possible cause	ECT sensor malfunction Ambient temperature sensor malfunction PCM malfunction Front body control module (FBCM) malfunction
System wiring diagram	-