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WRX STI
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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 Controls (Diagnostics) (H4DOTC) (WRX-STI)
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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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DTC P0171 System Too Lean Bank 1
DTC P0171 System Too Lean Bank 1
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). >