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Subaru
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2018
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Impreza Base, 4D Sedan, Standard Trans
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System (Diagnostics) (P0171 To P0685)
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Diagnostic Procedure With Diagnostic Trouble Code (DTC)
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DTC P0605: Internal Control Module Read Only Memory (ROM) Error
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Execution Condition
Execution Condition
Secondary parameters
Execution condition
Judgment 1: Checksum ECM initialization
RUN
Judgment 2: Error Correcting Code (ECC) check
Ignition switch
ON
Diagnosis with the initial routine.