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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transmission Control Module (TCM) - Nag1 Automatic Transmission >> Diagnosis And Testing >> U0121-Lost Communication With Anti-Lock Brake Module >> Possible Causes

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
BODY CONTROL MODULE (BCM)
MODULE THAT SET THIS DTC
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