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Home >> Subaru >> 2009 >> Forester XT >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0171 System Too Lean (Bank 1) >> Enable Condition

Enable Condition

ENABLE CONDITION

Secondary Parameters Enable Conditions
A/F main learning system In operation
Engine coolant temperature ≥ 70°C (158°F)
Engine load change < 0.02 g/rev (0 oz/rev)
Engine load ≥ Value of Map 1

MAP 1 

MAP SPECIFICATION

Engine speed (RPM) Idling 800 1200 1600 2000 2400 2800 3200 3600 4000 4400
Measured value (g(oz)/rev) na 0.228 (0.01) 0.22 (0.01) 0.22 (0.01) 0.22 (0.01) 0.228 (0.01) 0.23 (0.01) 0.234 (0.01) 0.242 (0.01) 0.25 (0.01) 0.25 (0.01)