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Home >> Subaru >> 2007 >> Outback i, Standard >> 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
Barometric pressure > 75.1 kPa (563 mmHg, 22.2 inHg)
Engine coolant temperature ≥ 70°C(158°F)
Catalyst warm-up counter (Map 2) (U5 model) ≥ 9000
Estimated catalyst temperature (except for U5 model) ≥ 650°C(1202°F)
Misfire detection every 200 rotations < 5 times
Learning value of evaporation gas density ≤ 0.20
Sub feedback In operation
Evaporative system diagnosis Not in operation
Time of difference (< 0.10) between actual and target lambda 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 oxygen output change from 660 mV or less to 660 mV or more Experienced after fuel cut
After engine starting ≥ 205 seconds
Purge execution calculated time 5 seconds or more