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Home >> Dodge and Ram >> 2017 >> Challenger SXT Plus >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Adaptive Front Lighting System Module - Electrical Diagnostics) >> DTC Troubleshooting >> U0121-00-Lost Communication With Antilock Brake System (Abs) Control Module >> Possible Causes
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Possible Causes

WARNING: This page is about a different car, the 2012 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
ANTI LOCK BRAKE MODULE (ABS) POWER AND GROUND
BCM NOT CONFIGURED CORRECTLY
ANTI LOCK BRAKE MODULE (ABS)
MODULE THAT SET THIS DTC