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Home >> Toyota >> 2009 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 18 (Engine Control System (1AR-FE) - DTC P0125 - P0500) >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions

Typical Enabling Conditions

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

Monitor runs whenever following DTCs not stored P0010 (Camshaft Timing Oil Control Valve)
P0011 (VVT System - Advance)
P0012 (VVT System - Retard)
P0016 (VVT System - Misalignment)
P0013 (Exhaust Camshaft Timing Oil Control Valve)
P0014 (Exhaust VVT System - Advance)
P0015 (Exhaust VVT System - Retard)
P0017 (Exhaust VVT System - Misalignment)
P0031, P0032, P101D (Air Fuel Ratio Sensor Heater)
P0037, P0038, P102D (Heated Oxygen Sensor Heater)
P2195, P2196, P2237, P2238, P2239, P2252, P2253, P2A00 (Air Fuel Ratio Sensor)
P0136, P0137, P0138, P0139, P0607 (Rear Oxygen Sensor)
P0102, P0103 (Mass Air Flow Meter)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position Sensor)
P0171, P0172 (Fuel System)
P0301 - P0304 (Misfire)
P0335 (Crankshaft Position Sensor)
P0340, P0342, P0343 (Camshaft Position Sensor)
P0365, P0367, P0368 (Exhaust Camshaft Position Sensor)
P0351 - P0354 (Igniter)
P0500 (Vehicle Speed Sensor)
Battery voltage 11 V or higher
Intake air temperature -10°C (14°F) or higher
Engine coolant temperature 75°C (167°F) or higher
Atmospheric pressure 76 kPa (570 mmHg) or higher
Idling OFF
Engine speed Less than 4000 rpm
Air fuel ratio sensor status Activated
Fuel system status Closed loop
Engine load 10 to 80%
All of the following conditions are met Condition 1, 2 and 3
1. Mass air flow rate 2.5 to 60 gm/sec
2. Front catalyst temperature (estimated) 510 to 840°C (950 to 1544°F)
3. Rear catalyst temperature (estimated) 370 to 770°C (698 to 1418°F)
Shift position 5th or higher