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Home >> Subaru >> 2011 >> Forester X, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0171 System Too Lean (Bank 1) >> Enable Condition
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Enable Condition

ENABLE CONDITION REFERENCE CHART

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
ENGINE COOLANT TEMPERATURE REFERENCE CHART

Engine speed (rpm) Idling 700 1000 1500 2000 2500 3000 3500 4000 4500
Measured value (g (oz)/rev) na 0.23 (0.01) 0.19 (0.01) 0.1825 (0.01) 0.2 (0.01) 0.2225 (0.01) 0.23 (0.01) 0.23 (0.01) 0.26 (0.01) 0.2625 (0.01)