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Home >> Subaru >> 2005 >> Outback i, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Enable Condition >> Notes
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Enable Condition: Notes

ENABLE CONDITION

Secondary Parameters Enable Conditions
Battery voltage > 10.9 V
Atmospheric pressure > 75.1 kPa (563 mmHg, 22.2 inHg)
Engine coolant temperature >/= 70°C (158°F)
Catalyst warm-up counter on Map 2 >/= 8000
Misfire detection during 200 engine revs. < 5 times
Learning value of evaporation gas density >/= 0.20
Sub feedback Operating
Evaporative system diagnostic Not in operation
Difference between actual and target time lambda < 0.10 1000 milliseconds or more
Vehicle speed > 70 km/h (43.5 MPH)
Amount of intake air 10 <-- --> 40 g (0.35 <-- --> 1.41 oz)/s
Engine load change every 0.5 engine revs. < 0.02 g/rev
Rear O2 output change from below 660 mV to over Experienced after fuel cut
After engine starting >/= 205 seconds
Purge execution cumulative time 5 seconds or more