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Home >> Toyota >> 2013 >> 4Runner Trail >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0420-P1605)) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever following DTCs are not present
P219A, P219B (Air-Fuel Ratio Imbalance)
P0010, P0020 (Camshaft Timing Oil Control Valve Assembly bank 1, 2)
P0011, P0021 (VVT System Bank 1, 2 - Advance)
P0012, P0022 (VVT System Bank 1, 2 - Retard)
P0013, P0023 (Exhaust Camshaft Timing Oil Control Valve Assembly Bank 1, 2)
P0014, P0024 (Exhaust VVT System Bank 1, 2 - Advance)
P0015, P0025 (Exhaust VVT System Bank 1, 2 - Retard)
P0016, P0018 (VVT System Bank 1, 2 - Misalignment)
P0017, P0019 (Exhaust VVT System Bank 1, 2 - Misalignment)
P0031, P0032, P0051, P0052, P101D, P103D (Air Fuel Ratio Sensor Heater)
P0037, P0038, P0057, P0058, P102D, P105D (Heated Oxygen Sensor Heater)
P0102, P0103 (Mass Air Flow Meter)
P0107, P0108 (Manifold Absolute Pressure)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position Sensor)
P0125 (Insufficient Engine Coolant Temperature for Closed Loop Fuel Control)
P0136, P0137, P0138, P0139, P013A (Heated Oxygen Sensor Bank 1)
P014C, P014D, P014E, P014F (Air Fuel Ratio Sensor - Slow Response)
P015A, P015B, P015C, P015D (Air Fuel Ratio Sensor - Delayed Response)
P013C, P0156, P0157, P0158, P0159 (Heated Oxygen Sensor Bank 2)
P0171, P0172, P0174, P0175 (Fuel System)
P0301, P0302, P0303, P0304, P0305, P0306 (Misfire)
P0335 (Crankshaft Position Sensor)
P0340, P0342, P0343, P0345, P0347, P0348 (VVT Sensor)
P0351, P0352, P0353, P0354, P0355, P0356 (Igniter)
P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT Sensor)
P0500 (Vehicle Speed Sensor)
P0607 (Heated Oxygen Sensor - Sensor 2)
P2195, P2196, P2197, P2198 (Air Fuel Ratio Sensor - Rationality)
P2237, P2240 (Air Fuel Ratio Sensor - Open)
P2238, P2241, P2252, P2255 (Air Fuel Ratio Sensor - Low Impedance)
P2239, P2242, P2253, P2256 (Air Fuel Ratio Sensor - High Impedance)
P0412, P0418, P1613 (Secondary Air Injection System Control)
P0416, P0417, P2440, P2441, P2442, P2443, P2444, P2445 (Secondary Air Injection System)
P219A, P219B (Air-Fuel Ratio Imbalance)
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 to 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 to 860°C (1274 to 1580°F)
3. Rear catalyst temperature (estimated) 500 to 900°C (932 to 1652°F)
Shift position 4th or higher