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Home >> Toyota >> 2012 >> Avalon Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0351-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 P0010, P0020 (OCV bank 1, 2)
P0011, P0021 (VVT system bank 1, 2 - advance)
P0012, P0022 (VVT system bank 1, 2 - retard)
P0013, P0023 (Exhaust OCV 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 (A/F sensor heater)
P0037, P0038, P0057, P0058, P102D, P105D (HO2 sensor heater)
P0102, P0103 (MAF meter)
P0115, P0117, P0118 (ECT sensor)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for closed loop fuel control)
P0136, P0137, P0138, P0139 (HO2 sensor bank 1)
P014C, P014D, P014E, P014F (Air fuel ratio sensor - slow response)
P015A, P015B, P015C, P015D (Air fuel ratio sensor - delayed response)
P0156, P0157, P0158, P0159 (HO2 sensor bank 2)
P0171, P0172, P0174, P0175 (Fuel system)
P0301, P0302, P0303, P0304, P0305, P0306 (Misfire)
P0335 (CKP 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 (HO2 sensor - sensor 2)
P2195, P2196, P2197, P2198 (A/F sensor - rationality)
P2237, P2240 (A/F sensor - open)
P2238, P2241, P2252, P2255 (A/F sensor - low impedance)
P2239, P2242, P2253, P2256 (A/F sensor - high impedance)
Battery voltage 11 V or more
IAT -10°C (14°F) or more
ECT 75°C (167°F) or more
Atmospheric pressure 76 kPa(abs) [570 mmHg(abs)] or more
Idle OFF
Engine speed Less than 3200 rpm
A/F sensor status Activated
Fuel system status Closed loop
Engine load 10% or more, and less than 70%
All of the following conditions 1, 2 and 3 are met: -
1. MAF 5 g/sec. or more, and less than 60 g/sec.
2. Front catalyst temperature (estimated) 600°C (1112°F) or more, and less than 800°C (1472°F)
3. Rear catalyst temperature (estimated) 100°C (212°F) or more, and less than 900°C (1652°F)
Shift position 4th or higher