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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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System
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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 P0171 System Too Lean Bank 1
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Notes
DTC P0171 System Too Lean Bank 1: Notes
NOTE:
For the diagnostic procedure, refer to DTC P0172. <Ref. to
DTC P0172 SYSTEM TOO RICH BANK 1
, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>