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Subaru
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2017
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WRX Base
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Repair and Diagnosis (Single Page)
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Engine Performance
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Testing & Diagnosis
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Engine Control System (Diagnostics) (P0171 To P0685) (2.0L)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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DTC P0604 Internal Control Module Random Access Memory (Ram) Error
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General Driving Cycle
General Driving Cycle
Perform the diagnosis as soon as the ignition switch is turned to ON.