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Home >> Chrysler >> 2009 >> 300 Limited, RWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) - Electrical Diagnostics >> DTC Troubleshooting >> P1644-Incorrect Variant/Configuration >> Possible Causes
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Possible Causes

Possible Causes 
CONTROLLER NOT CODED
TRANSMISSION CONTROL MODULE

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure