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Impreza WRX STi
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Repair and Diagnosis (Single Page)
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Engine Performance
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ENGINE (DIAGNOSTICS) (STi)
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Basic Diagnostic Procedure
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DTC P0604: Internal Control Module Random Access Memory (Ram) Error
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Diagnostic Chart:
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Diagnostic Chart:
Fig 1: Diagnosis Chart
Courtesy of SUBARU OF AMERICA, INC.