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DTC P0605 - Internal Control Module Read Only Memory (ROM) Error

P0605 - INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM) ERROR

Description:  The PCM ROM has been corrupted.
Possible Causes: 
  • An attempt was made to change the calibration
  • Module programming error
  • Aftermarket performance products
  • Damaged PCM
Diagnostic Aids:  Reprogram the vehicle identification (VID) block. Check for other DTCs or drive symptoms for further action. 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) , Programming the (VID) Block for a Replacement PCM.
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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