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Home >> Jeep >> 2021 >> Grand Cherokee L Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 24 (8HP75 Automatic Transmission - DTCS P0219-00 To P1D78-00) >> Diagnosis And Testing >> P064F-00: Unauthorized Software/Calibration Detected >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
WRONG TRANSMISSION CONTROL MODULE (TCM) SOFTWARE/CALIBRATION INSTALLED

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .

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