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Home >> Toyota >> 2005 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System (SFI) (1ZZ-FE(4WD)) - Diagnostics) >> SFI System (1ZZ-FE (4WD)) >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions
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Typical Enabling Conditions

WARNING: This page is about a different variant/trim than selected.
TYPICAL ENABLING CONDITIONS CHART

Monitor runs whenever following DTCs not present See LIST OF DISABLE A MONITOR 
Accumulated time that following conditions met 20 seconds
Battery voltage 11 V or more
Intake air temperature -10°C (14°F) or more
Idling OFF
Intake air amount 8.5 to 25 g/sec
Engine speed Less than 4,000 rpm
Engine coolant temperature 75°C (167°F) or more
Estimated TWC temperature Up stream catalyst: 500° to 900°C (932° to 1,652°F) Down stream catalyst: 350° to 900°C (662° to 1,652°F)
Fuel system status Closed-loop