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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 >> Set Condition:

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Set Condition:

If the TCM detects that the variables that dictate the vehicle application are not present.

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