DTC U0121 (SOBDMC) - Lost Communication With Anti-Lock Brake System (ABS) Control Module

DTC DESCRIPTION U0121 (SOBDMC) - LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE

Description: The SOBDMC continuously monitors the controller area network (CAN) for messages from the anti-lock brake system (ABS) module. This DTC sets when the SOBDMC does not receive the ABS message within the defined amount of time.
Possible Causes: Module communications network concerns ABS communications network concerns Low voltage system concerns
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST QD .