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Home >> Scion >> 2015 >> xB Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes (P0010-P0420)) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) [11/2014 - ] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever following DTCs not present P0010 (Camshaft Timing Oil Control Valve)
P0011 (VVT System - Advance)
P0012 (VVT System - Retard)
P0016 (VVT System - Misalignment)
P0031, P0032 (Air Fuel Ratio Sensor Heater)
P0037, P0038 (Heated Oxygen Sensor Heater)
P0136, P0137, P0138, P0139, P0607 (Rear Oxygen Sensor)
P0102, P0103 (Mass Air Flow Meter)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position Sensor)
P0171, P0172 (Fuel System)
P0300 - P0304 (Misfire)
P0335 (Crankshaft Position Sensor)
P0340 (Camshaft Position Sensor)
P0351 - P0354 (Igniter)
P0500 (Vehicle Speed Sensor)
P2195, P2196, P2237, P2238, P2239, P2252, P2253, P014C, P014D, P015A, P015B (Air Fuel Ratio Sensor)
Battery voltage 11 V or higher
Intake air temperature -10°C (14°F) or more
Engine coolant temperature 75°C (167°F) or more
Atmospheric pressure coefficient 0.75 or more
Idling OFF
Engine speed Less than 4000 rpm
Air fuel ratio sensor status Activated
Fuel system status Closed loop
Engine load 10% or more, and less than 80%
All of the following conditions are met Condition 1, 2 and 3
1. Mass air flow rate 2.5 g/sec or more, and less than 50 g/sec
2. Front catalyst temperature (estimated) 685°C (1265°F) or more, and less than 840°C (1544°F): for Automatic Transaxle
665°C (1229°F) or more, and less than 840°C (1544°F): for Manual Transaxle
3. Rear catalyst temperature (estimated) 400°C (725°F) or more, and less than 770°C (1418°F)
Shift position 4th or higher: for Automatic Transaxle
3rd or higher: for Manual Transaxle