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Home › Jeep › 2006 › Commander Base, 3.7 K, RWD › Repair and Diagnosis › Transmission › Transmission Control Systems › Nag1 Automatic Transmission - Electrical Diagnostics › Electrical Diagnostics › DTC Troubleshooting › P1644-Incorrect Variant/Configuration › Possible Causes

Possible Causes

Possible Causes
CONTROLLER NOT CODED
TRANSMISSION CONTROL MODULE

Always perform the NAG1 PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.