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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 >> U0401-Implausible Data Received From ECM/Pcm >> Possible Causes
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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 OPEN OR SHORTED CONDITION
POWERTRAIN CONTROL MODULE (PCM) DTCS PRESENT
FRONT CONTROL MODULE (FCM) DTCS PRESENT
ENGINE DTCS PRESENT
FINAL DRIVE CONTROL MODULE (FDCM)
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