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Home >> Scion >> 2006 >> tC Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (2AZ-FE) >> SFI System >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions

Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS

Accumulated time that all following conditions met 30 seconds or more
Battery voltage 11 V or more
Intake air temperature -10°C (14°F) or more
Idle OFF
Mass air flow rate 6 to 35 g/sec
Engine RPM Less than 4,500 rpm
Engine coolant temperature sensor 75°C (167°F) or more
Fuel system status Closed Loop
Rich experience Yes
A/F sensor Activated
HO2 sensor Activated
Estimated catalyst temperature Both of following conditions 1 and 2 met
1. Up stream catalyst temperature 550 to 900°C (1,022 to 1,652°F)
1. Down stream catalyst temperature 550 to 900°C (1,022 to 1,652°F)