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Home >> Alfa Romeo >> 2017 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P0480-00 To P0687-00 >> DTC Troubleshooting >> P0633-00-Immobilizer Key Not Programmed - ECM/Pcm >> Possible Causes

Possible Causes

Possible Causes
SECRET KEY CODE FAILED TO TRANSFER TO THE PCM
HIGH OR LOW BATTERY VOLTAGE
NO COMMUNICATION WITH BODY CONTROL MODULE (BCM)
POWERTRAIN CONTROL MODULE (PCM)

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

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