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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 463 (Engine Control System (SFI) - Diagnostics) >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS

Item Specification
Minimum Maximum
The monitor will run whenever the following DTCs are not present See LIST OF DISABLE A MONITOR 
Battery voltage 11 V -
Intake air temperature -10°C(14°F) -
Idle OFF
Intake air amount 8.5 g/sec 25 g/sec
Engine speed - 4,000 rpm
Engine coolant temperature 75°C (167°F) -
Estimated catalyst temperature conditions are met: 1 and 2
1. Upstream catalyst 500°C (932°F) 900°C (1,472°F)
2. Downstream catalyst 350°C (932°F) 900°C (1,472°F)
Fuel system status Closed loop