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Home › Chrysler › 2012 › 300 C, 4WD › Repair and Diagnosis › Transmission › Transmission Control Systems › Transmission Control Module (TCM) - Nag1 Automatic Transmission › Diagnosis And Testing › P1644-Incorrect Variant/Configuration › Set Condition:

Set Condition:

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

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