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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> (Drivetrain Control Module (DTCM) - Electrical Diagnostics) >> DTC Troubleshooting >> U0121-Lost Communication With Abs >> Possible Causes
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Possible Causes

Possible Causes 
CAN BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
BODY CONTROL MODULE (BCM) POWER AND GROUND
BCM NOT CONFIGURED CORRECTLY
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE
BODY CONTROL MODULE (BCM)
MODULE THAT SET THIS DTC