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Home >> Toyota >> 2006 >> Corolla CE, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Control System (SFI) (2ZZ-GE) - Diagnostics) >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions

Typical Enabling Conditions

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TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs not present See LIST OF DISABLE A MONITOR 
Accumulated time that following conditions met 30 seconds
Battery voltage 11 V or more
Intake air temperature -10°C (14°F) or more
Idling OFF
Intake air amount 7 to 25 gm/sec
Engine speed Less than 4,500 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