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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 178 (Engine Control System (2GR-FSE) - DTC P0171 - P050A) >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430 Catalyst System Efficiency Below Threshold (Bank 2) >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs are not present P0011 (VVT System 1 - Advance)
P0012 (VVT System 1 - Retard)
P0021 (VVT System 2 - Advance)
P0022 (VVT System 2 - Retard)
P0031, P0032, P0051, P0052 (A/F sensor heater - Sensor 1)
P0037, P0038, P0057, P0058 (HO2 sensor heater - Sensor 2)
P0100 - P0103 (MAF meter)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for Closed Loop)
P0136, P0156 (HO2 sensor - Sensor 2)
P0171, P0172, P0174, P0175 (Fuel system)
P0300 - P0306 (Misfire)
P0335 (CKP sensor)
P0340 (VVT sensor)
P0351 - P0356 (Igniter)
P0500 (VSS) P2196, P2198 (A/F sensor - rationality)
P2237, P2240 (A/F sensor - open)
P2A00, P2A03 (A/F sensor - slow response)
Battery voltage 11 V or more
IAT -10°C (14°F) or more
Engine coolant temperature 75°C (167°F) or more
Atmospheric pressure 70 kPa (525 mmHg) or more
Idle OFF
Engine RPM Less than 3200 rpm
A/F sensor Activated
Fuel system status Closed loop
Engine load 10 to 75%
All of the following conditions are met: Condition 1, 2 and 3
1. MAF 5 to 45 g/sec.
2. Front catalyst temperature (estimated) 620 to 800°C (1148 to 1472°F)
3. Rear catalyst temperature (estimated) 620 to 800°C (1148 to 1472°F)
Rear HO2S monitor Completed
Shift position 4th or more