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Home › Subaru › 2017 › WRX STI › Repair and Diagnosis › Engine Performance › System › Engine Control System (Diagnostics) (P0171 To P0685) (2.5L) › Diagnostic Procedure with Diagnostic Trouble Code (DTC) › DTC P0605 Internal Control Module Read Only Memory (ROM) Error › General Driving Cycle

General Driving Cycle

Perform the diagnosis immediately after the ignition switch is to ON.

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