LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (4GR-FSE) - DTC P0171 - P0606 >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1); DTC P0430 Catalyst System Efficiency Below Threshold (Bank 2) >> Typical Enabling Conditions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Typical Enabling Conditions

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 (CMP sensor)
P0351 - P0356 (Ignitor)
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
Engine coolant temperature sensor 75°C (167°F) or more
Atmospheric pressure coefficient 76 kPa (570 mmHg) or more
Idle OFF
Engine RPM Less than 4,000 rpm
A/F sensor status Activated
Fuel system status Closed loop
Engine load 10 to 70%
All of the following conditions are met: Condition 1, 2 and 3
1. MAF 5 to 45 g/sec.
2. Front catalyst temperature (estimated) 600 to 840°C (1,112 to 1,544°F)
3. Rear catalyst temperature (estimated) 600 to 840°C (1,112 to 1,544°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 4th or higher