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DTC P1639 - Vehicle Id Block Corrupted, Not Programmed

P1639 - VEHICLE ID BLOCK CORRUPTED, NOT PROGRAMMED

Description:  This DTC sets when the vehicle identification (VID) block is not programmed or the information within is corrupt.
Possible Causes: 
  • Module reprogramming
Diagnostic Aids:  Using a scan tool, program the PCM to the most recent calibration available. Reprogram or update the calibration. Check for other DTCs or drive symptoms for further action. Make sure to check for aftermarket performance products before installing a new PCM. If it is necessary to install a new PCM, refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .
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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