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Home >> Jeep >> 2012 >> Wrangler Sahara, Automatic Trans >> 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 (TCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  STANDARD PROCEDURE  . 

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