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Home >> Toyota >> 2021 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (P0416-P0550) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) [08/2015 - ] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever the following DTCs are not present P0010, P0020 (VVT Oil Control Valve)
P0011, P0021 (VVT System - Advance)
P0012, P0022 (VVT System - Retard)
P0016, P0018 (VVT System - Misalignment)
P0013, P0023 (Exhaust VVT Oil Control Valve)
P0014, P0024 (Exhaust VVT System - Advance)
P0015, P0025 (Exhaust VVT System - Retard)
P0017, P0019 (Exhaust VVT System - Misalignment)
P0031, P0032, P0051, P0052, P101D, P103D (Air Fuel Ratio Sensor Heater)
P0037, P0038, P0057, P0058, P102D, P105D (Rear Oxygen Sensor Heater)
P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196, P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 (Air Fuel Ratio Sensor)
P0136, P0137, P0138, P0139, P0156, P0157, P0158, P0159, P0606, P0607, P013A, P013C (Rear Oxygen Sensor)
P0102, P0103 (Mass Air Flow Sensor)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0125 (Insufficient Engine Coolant Temperature for Closed Loop Fuel Control)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position Sensor)
P0171, P0172, P0174, P0175 (Fuel System)
P219A, P219B, P219C, P219D, P219E, P219F, P21A0, P21A1 (Air-Fuel Ratio Imbalance)
P0300, P0301, P0302, P0303, P0304, P0305, P0306 (Misfire)
P0335 (Crankshaft Position Sensor)
P0340, P0342, P0343, P0345, P0347, P0348 (VVT Sensor)
P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT Sensor)
P0351, P0352, P0353, P0354, P0355, P0356 (Igniter)
P0412, P0418, P1613 (Secondary Air Injection System Control)
P0416, P0417, P2440, P2441, P2442, P2443, P2444, P2445 (Secondary Air Injection System)
P0500 (Vehicle Speed Sensor)
Auxiliary battery voltage 11 V or more
Intake air temperature -10°C (14°F) or more
Engine coolant temperature 75°C (167°F) or more
Atmospheric pressure 76 kPa(abs) [570 mmHg(abs)] or more
Idle OFF
Engine speed Less than 3200 rpm
Air fuel ratio sensor Activated
Fuel system status Closed loop
Engine load 10% or more, and less than 70%
All of the following conditions are met: Conditions 1, 2 and 3
1. Mass air flow 5 to 75 g/sec
2. Front catalyst temperature (estimated) 690°C (1274°F) or more, and less than 860°C (1580°F)
3. Rear catalyst temperature (estimated) 500°C (932°F) or more, and less than 900°C (1652°F)
Shift position 4th or higher