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Home >> Chrysler >> 2012 >> 300 Base, Trans Mfr CD 8HP45, Gas >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (Transmission Control Module (TCM) - Nag1 Automatic Transmission) >> Diagnosis And Testing >> U0121-Lost Communication With Anti-Lock Brake Module >> Possible Causes

Possible Causes

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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