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Home >> Jeep >> 2025 >> Grand Cherokee Altitude, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (2.0L - DTCS P062D To P0685) >> DTC Troubleshooting >> P0633 Skim Secret Key Not Stored In Pcm >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2025 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
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:  2.0L - PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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