C149B Code: Meaning, Causes, and Symptoms | OBD2 Codes

C149B – Rear Driveline Module


C149B Possible Symptoms


Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)


C149B Possible Causes


Faulty Rear Driveline Module (RDM),Rear Driveline Module (RDM) harness is open or shorted,Rear Driveline Module (RDM) circuit poor electrical connection,Faulty Drive Train Control Module (DTCM)


C149B Description


The Drive Train Control Module (DTCM) monitors the Rear Driveline Module (RDM). The DTCM sets the OBDII code when it detects that the Rear Driveline Module (RDM) system voltage is below or above normal voltage, or an overheating condition due to excessive usage of components from hard driving conditions (Mud, Sand, Snow, 2WD Chassis dynamometer etc.) or ambient temperatures.