LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Dodge and Ram
>>
2009
>>
Journey R/T, AWD
>>
Repair and Diagnosis
>>
Transmission
>>
Automatic Trans
>>
(Transmission Control Module (TCM) - Electrical Diagnostics)
>>
DTC Troubleshooting
>>
U0121-Lost Communication With Anti-Lock Brake Module
>>
Possible Causes
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
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
ABS POWER AND GROUND
MODULE THAT SET THIS DTC