LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Jeep
>>
2009
>>
Liberty Limited, 4WD, Part Time
>>
Repair and Diagnosis
>>
Transmission
>>
Automatic Trans
>>
Powertrain Control Module (Pcm) - Electrical Diagnostics - 42RLE Automatic Transmission
>>
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
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
CAN C BUS CIRCUITS OPEN OR SHORTED
ABS MODULE POWER AND GROUND
ABS MODULE
POWERTRAIN CONTROL MODULE (PCM)