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Home >> Jeep >> 2024 >> Grand Cherokee Altitude X, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 77 (2.0L - DTCS P0627 To P0643) >> DTC Troubleshooting >> P0633-Skim Secret Key Not Stored In Pcm >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
PCM WAS REPLACED AND THE "PCM REPLACED" ROUTINE HAS NOT BEEN RUN
DEFAULT SECRET KEY VALUE WAS RECORDED IN THE WCM/WIN DUE TO DTC BEING ERASED BEFORE THE "WCM/WIN REPLACED" ROUTINE WAS RUN

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

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