DTC U2125-00: Communication Error With Driver Monitoring Camera Unit [Vehicle Control Module]: Outline

WARNING: This page is about a different car, the 2021 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

DTC U2125:00 [VEHICLE CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Communication error with driver monitoring camera unit
Detection condition	The vehicle control module cannot receive CAN signal from the driver monitoring camera unit for 10 s.
Fail-safe	(See DTC TABLE [VEHICLE CONTROL MODULE (US)] .)
Possible cause	Power is not supplied from vehicle control module (VCM) to driver monitoring camera (built into center display) Malfunction in CAN communication line between vehicle control module (VCM) and driver monitoring camera unit Driver monitoring camera unit malfunction Vehicle control module (VCM) malfunction (built into body control module (BCM))
System wiring diagram	Not applicable