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Home >> Subaru >> 2022 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (2 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0171: System Too Lean Bank 1 >> General Description >> Execution Condition
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Execution Condition

Secondary parameters Execution condition DTC
Main feedback Oil dilution In operation
Unspecified
P0171, P0172
(Diagnosis A)
P0171 malfunction Port injection ratio
Detected 100% P1170
(Diagnosis B)
P0172 malfunction Port injection ratio
Detected 100%
(Diagnosis A)
P0171 malfunction Cylinder injection ratio
Detected 100% P117B
(Diagnosis B)
P0172 malfunction Cylinder injection ratio
Detected 100%