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Home >> Lexus >> 2023 >> LS 500 F Sport, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (07 Of 14) >> SFI System >> DTC P0420-00: Catalyst System Efficiency Below Threshold Bank 1; DTC P0430-00: Catalyst System Efficiency Below Threshold Bank 2 [12/2017 - 10/2020] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever the following DTCs are not stored P0010, P0020, P1023, P1360, P1361, P1362, P1363, P1364, P1365, P1366, P1367, P2614 (Motor drive VVT system control module)
P0011, P0021 (VVT system - advance)
P0012, P0022 (VVT system - retard)
P0013, P0023 (Exhaust VVT oil control solenoid)
P0014, P0024 (Exhaust VVT system - advance)
P0015, P0025 (Exhaust VVT system - retard)
P0016, P0018 (VVT system - misalignment)
P0017, P0019 (Exhaust VVT system - misalignment)
P0031, P0032, P0051, P0052, P101D, P103D (Air fuel ratio sensor (sensor 1) heater)
P0037, P0038, P0057, P0058, P102D, P105D (Air fuel ratio sensor (sensor 2) heater)
P00D5, P00D6, 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 (sensor 1))
P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side))
P00AB, P00AC, P00AD, P0111, P0112, P0113 (Intake air temperature sensor)
P00CF, P00D0, P0237, P0238, P0241, P0242 (Turbocharger)
P0102, P0103, P010C, P010D, P010F (Mass air flow meter)
P0106, P0107, P0108 (Manifold absolute pressure)
P0117, P0118 (Engine coolant temperature sensor)
P0121, P0122, P0123, P0222, P0223, P0226, P0227, P0228, P212C, P212D, P2135, P2AD1 (Throttle position sensor)
P0125 (Insufficient coolant temperature for closed loop fuel control)
P0128 (Thermostat)
P0136, P013A, P013C, P0156, P2270, P2271, P2272, P2273, P22AB, P22AC, P22AD, P22B3, P22B4, P22B8, P22B9, P22BA, P22C0, P22C1 (Air fuel ratio sensor (sensor 2))
P0171, P0172, P0174, P0175 (Fuel system)
P0201, P0202, P0203, P0204, P0205, P0206, P062D, P21CF, P21D0, P21D1, P21D2, P21D3, P21D4 (Fuel injector)
P0300, P0301, P0302, P0303, P0304, P0305, P0306 (Misfire)
P0327, P0328, P0332, P0333 (Knock control sensor)
P0335, P0337, P0338 (Crankshaft position sensor)
P0340, P0342, P0343, P0345, P0347, P0348 (Camshaft position sensor)
P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust camshaft position sensor)
P0500 (Vehicle speed sensor)
P0657, P0658, P2102, P2103, P210C, P210D, P2111, P2112, P2119, P211A, P211B, P211D, P2669, P2670 (Throttle actuator)
P0722, P077C, P077D (Output speed sensor)
P107B, P107C, P107D (No. 2 fuel pressure sensor (for low pressure side))
P11EA, P11EB, P11EC, P11ED, P11EE, P11EF, P11F0, P11F1, P219A, P219B, P219C, P219D, P219E, P219F, P21A0, P21A1 (Air-fuel ratio imbalance)
P1235, P1236 (High pressure fuel pump circuit)
P2228, P2229 (Atmospheric pressure sensor)
Response rate during fuel cut from rich condition Completed
Battery voltage 11 V or higher
Intake air temperature (mass air flow meter sub-assembly) -10°C (14°F) or higher
Engine coolant temperature 75°C (167°F) or higher
Atmospheric pressure 76 kPa(abs) [11 psi(abs)] or higher
Idling Off
Engine speed Less than 3200 rpm
Sub feedback control Executing
Air fuel ratio sensor (sensor 1) status Activated
Fuel system status Closed loop
Engine load 10% or higher, and less than 140%
All of the following conditions are met 1, 2 and 3
1. Mass air flow 5 gm/sec or more, and less than 60 gm/sec
2. Front catalyst temperature (estimated) 500°C (932°F) or higher, and less than 800°C (1472°F)
3. Rear catalyst temperature (estimated) 230°C (446°F) or higher, and less than 700°C (1292°F)
Shift position 3rd or higher