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DTC P0604: Internal Control Module Random Access Memory (Ram) Error: Notes

DTC P0604 CHART (MZI-3.7)

DTC P0604 Internal control module random access memory (RAM) error
DETECTION CONDITION 
  • Indicates the PCM RAM has been corrupted.
POSSIBLE CAUSE 
  • Module reprogramming
  • Aftermarket performance products.
  • PCM malfunction
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