LEMON Manuals
: Even more car manuals for everyone: 1960-2025
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Dodge and Ram
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2009
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Durango Base, 3.7 K
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Repair and Diagnosis
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Engine Performance
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Ignition System
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(Front Control Module (FCM) - Electrical Diagnostics)
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DTC Troubleshooting
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U0121-Lost Communication With Anti-Lock Brake System (Abs) Control Module
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Possible Causes
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Possible Causes
Possible Causes
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
ANTILOCK BRAKE MODULE
ANTILOCK BRAKE MODULE POWER AND GROUND
MODULE THAT SET THIS DTC