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Home >> Subaru >> 2015 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) (STI) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P015A O2 Sensor Delayed Response - Rich To Lean (Bank 1 Sensor 1) >> Enable Conditions

Enable Conditions

Diagnostic method 1 and 2 

ENGINE SPEED SPECIFICATION

Secondary Parameters Enable Conditions
Battery voltage ≥ 10.9 V
Closed loop control with main feedback (3000 ms or more) Operation
Engine speed ≥ 1000 rpm
Amount of intake air ≥ 10 g/s (0.35 oz/s)

Diagnostic method 3 

VEHICLE SPEED SPECIFICATION

Secondary Parameters Enable Conditions
Battery voltage ≥ 10.9 V
Closed loop control with main feedback Operation
Vehicle speed > 40 km/h (24.9 MPH)
Engine speed ≥ 1000 rpm
and
< 4000 rpm
Amount of intake air ≥ 10 g/s (0.35 oz/s)
and
< 40 g/s (1.41 oz/s)
Catalyst depletion diagnosis Not under diagnosis