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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 189 (Engine Control System (2AZ-FE)) >> SFI System >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions
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Typical Enabling Conditions

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs not present P0011 (VVT System 1 - Advance)
P0012 (VVT System 1 - Retard)
P0031, 32 (A/F Sensor heater - Sensor 1)
P0037, 38 (O2 Sensor heater - Sensor 2)
P0100 - P0103 (MAF meter)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for Closed Loop)
P0136 (O2 Sensor - Sensor 2)
P0171, P0172 (Fuel system)
P0300 - P0304 (Misfire)
P0335 (CKP sensor)
P0340 (CMP sensor)
P0351 - P0354 (Igniter)
P0500 (VSS)
P2196 (A/F Sensor - rationality)
P2A00 (A/F Sensor - slow response)
Battery voltage 11 V or more
Intake air temperature -10°C (14°F) or more
Engine coolant temperature 75°C (167°F) or more
Atmospheric pressure 76 kPa (570 mmHg) or more
Idling OFF
Engine RPM Less than 4,000 rpm
A/F sensor status Activated
Fuel system status Closed loop
Engine load 10 to 80 %
All of following conditions (a), (b) and (c) met -
(a) Mass air flow rate 2.5 to 40 g/sec.
(b) Estimated front catalyst temperature 650° to 840°C (1,202° to 1,544°F)
(c) Estimated rear catalyst temperature 400° to 770°C (752° to 1,418°F)
Rear HO2 sensor heater monitor Completed
Shift position 4th