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Subaru
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2018
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Impreza Base, 4D Sedan, Automatic CVT 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)
›
Diagnostic Procedure With Diagnostic Trouble Code (DTC)
›
DTC P0604: Internal Control Module Random Access Memory (Ram) Error
›
Execution Condition
Execution Condition
Secondary parameters
Execution condition
Judgment 1
ECM initialization
RUN
Judgment 2
Ignition switch
ON
Diagnosis with the initial routine.