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Home › Dodge and Ram › 2008 › Challenger › Repair and Diagnosis › Steering › Steering Control Systems › Steering Control Module (SCM) - Electrical Diagnostics › DTC Troubleshooting › U0121-Lost Communication With Anti-Lock Brake System (Abs) Control Module › Possible Causes

Possible Causes

Possible Causes 
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
TIPM NOT CONFIGURED CORRECTLY
ABS MODULE
ABS MODULE POWER AND GROUND
MODULE THAT SET THIS DTC
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