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Home >> Lexus >> 2010 >> LS 600hL >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostic Codes (P0010-P0441) >> 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 not present 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 valve)
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 (Air fuel ratio sensor heater)
P0037, P0038, P0057, P0058 (Rear oxygen sensor heater)
P0102, P0103 (Mass air flow meter)
P0115, P0117, P0118 (Engine coolant temperature sensor)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor)
P0125 (Insufficient coolant temperature for closed loop fuel control)
P0136, P0137, P0138, P0139, P0156, P0157, P0158, P0159, P0606, P0607 (Rear oxygen sensor)
P0171, P0172, P0174, P0175 (Fuel system)
P0301 - P0308 (Misfire)
P0335 (Crankshaft position sensor)
P0340, P0342, P0343, P0345, P0347, P0348, P1340 (VVT sensor)
P0351 - P0358 (Igniter)
P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT sensor)
P0412, P0415, P0418, P0419, P1613, P1614 (Secondary air injection system control)
P2195, P2196, P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256, P2A00, P2A03 (Front oxygen/Air fuel ratio sensor)
Battery voltage 11 V or higher
IAT -10°C (14°F) or more
Engine coolant temperature 75°C (167°F) or more
Atmospheric pressure 75 kPa (570 mmHg) or more
Idling OFF
Engine RPM Less than 3500 rpm
A/F sensor status Activated
Fuel system status Closed loop
Engine load 10 to 80%
When all conditions below are met Condition 1, 2 and 3
1. Mass air flow 3 to 60 g/sec.
2. Front catalyst temperature (estimated) 530 to 800°C (986 to 1472°F)
3. Rear catalyst temperature (estimated) 410 to 700°C (770 to 1292°F)
Rear HO2 sensor monitor Completed
Shift position 1st or higher