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Home >> Lexus >> 2008 >> ES 350 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - Diagnostic Codes (2 Of 4) >> 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

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs are not present P0011, 14 (VVT System 1 - Advance)
P0012, 15 (VVT System 1 - Retard)
P0031, 32, 51, 52 (A/F Sensor heater - Sensor 1)
P0037, 38, 58, 59 (O2 Sensor heater - Sensor 2)
P0101 - P0103 (MAF meter)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for Closed Loop)
P0136, P0156 (O2 Sensor - Sensor 2)
P0171, P0172, P0174, P0175 (Fuel system)
P0300 - P0304 (Misfire)
P0335 (CKP sensor)
P0340 (CMP sensor)
P0351 - P0354 (Igniter)
P0500 (VSS)
P2196, P2198 (A/F Sensor - rationality)
P2A00, P2A03 (A/F Sensor - slow response)
Battery voltage 11 V or more
IAT -10°C (14°F) or more
ECT 75°C (167°F) or more
Atmospheric pressure 70 kPa (525 mmHg) or more
Idle OFF
Engine RPM Less than 4000 rpm
A/F sensor Activated
Fuel system status Closed loop
Engine load 10 to 70%
All of the following conditions 1, 2 and 3 are met. -
1. MAF 6 to 25 g/sec
2 Front catalyst temperature (estimated) 500 to 800°C (932 to 1472°F)
3. Rear catalyst temperature (estimated) 500 to 800°C (932 to 1472°F)
EVAP system monitor The monitor has not run yet or the vacuum introduction has been completed
A/F sensor monitor Completed
Rear HO2S monitor Completed
Shift position 3rd or higher