LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Dodge and Ram >> 2008 >> Durango 4.7 P, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 74 (Final Drive Control Module (FDCM) - Electrical Diagnostics) >> DTC Troubleshooting >> U0101-Lost Communication With TCM >> Possible Causes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Possible Causes

WARNING: This page is about a different car, the 2009 Dodge Durango and 2009 Chrysler Aspen. 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
FRONT CONTROL MODULE (FCM) NOT CONFIGURED CORRECTLY
TRANSMISSION CONTROL MODULE (TCM) POWER AND GROUND
TRANSMISSION CONTROL MODULE (TCM)
MODULE THAT SET THIS DTC
WARNING: On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury. Refer to Electrical - Engine Systems/Battery System - Warning