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DTC P1639 - Vehicle ID Block Corrupted, Not Programmed

DTC DESCRIPTION P1639 - VEHICLE ID BLOCK CORRUPTED, NOT PROGRAMMED

Description:  This DTC sets when the vehicle identification (VID) block is not programmed or the information is corrupt.
Possible Causes: 
  • New powertrain control module (PCM)
  • Incorrect PCM
  • Incorrect vehicle identification configuration
Diagnostic Aids:  The VID block must be programmed. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block For A Replacement PCM. If the PCM does not allow reprogramming of the VID block, reflashing of the PCM is required.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
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