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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 17 (Engine Control System) >> 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

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS

Monitor will run whenever these DTCs are not present P0011 (VVT system 1 - advance)
P0012 (VVT system - retard)
P0021 (VVT system 2 - advance)
P0022 (VVT system 2 - retard)
P0031, P0032, P0051, P0052 (heated oxygen sensor 1)
P0037, P0038, P0057, P0058 (heated oxygen sensor 2)
P0100 - P0103 (MAF meter)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (insufficient ECT for closed loop)
P0130, P0153 (heated oxygen sensor 1)
P0134, P0154 (heated oxygen sensor 2)
P0136, P0156 (heated oxygen sensor 1)
P0171, P0712 (fuel system)
P0300 - P0308 (misfire)
P0335 (crankshaft position sensor)
P0351 - P0358 (igniter)
P0500 (VSS)
Accumulated time that all of following conditions are met 20 seconds
Battery voltage 11 V or more
IAT -10°C (14°F) or more
Idle status OFF
MAF 13 to 40g/sec.
Engine rpm Less than 4,000 rpm
ECT 75°C (167°F) or more
Fuel system status Closed loop
Estimated catalyst temperature Both of the following conditions 1 and 2 are met
1. Up stream catalyst temperature 500 to 800°C (932 to 1,472°F)
2. Down stream catalyst temperature 500 to 800°C (932 to 1,472°F)