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P0604 - Internal Control Module Random Access Memory (Ram) Error

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P0604 - INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR

Description:  Indicates the powertrain control module (PCM) RAM has been corrupted.
Possible Causes: 
  • Module reprogramming
  • Aftermarket performance products.
  • Damaged PCM
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All 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 toFLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .
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