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Home >> Scion >> 2013 >> FR-S Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes P0300 - P050A)) >> SFI System >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) [05/2013 - ] >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor runs whenever following DTCs are not present P0030, P0031, P0032 (Air fuel ratio sensor - heater)
P0037, P0038 (Heated oxygen sensor - heater)
P0068, P0107, P0108 (Manifold absolute pressure (MAP) sensor)
P0101, P0102, P0103 (Mass air flow (MAF) sensor)
P0111, P0112, P0113 (Intake air temperature (IAT) sensor)
P0117, P0118, P0125 (Engine coolant temperature (ECT) sensor)
P0122, P0123, P0222, P0223 (Throttle position sensor)
P0131, P0132 (Air fuel ratio sensor - ECM input voltage)
P0134, P2195, P2196 (Air fuel ratio sensor - output voltage)
P0137, P0138 (Heated oxygen sensor - a lack of circuit continuity)
P0140 (Heated oxygen sensor - output voltage)
P014C, P014D, P015A, P015B (Air fuel ratio sensor - response)
P0461, P0462, P0463 (Fuel level sensor (FL))
P0500 (Vehicle speed sensor (VSS))
P0604 (RAM in ECM)
P0605 (ROM in ECM)
P1160 (Throttle return spring)
P2096, P2097 (Post catalyst fuel trim system)
P2101, P2102 (Throttle actuator control motor)
P2109 (Throttle position sensor minimum stop)
P2119 (Throttle actuator control)
P2122, P2123, P2127, P2128 (Accelerator pedal position sensor (APPS) circuit)
P2135 (Throttle position sensor (TPS) correlation)
P2138 (Accelerator pedal position sensor (APPS) correlation)
Battery voltage 10.9 V or more
Fuel system status Closed loop
Intake air mass per second 5 to 30 g/sec
Estimated exhaust gas temperature in a catalyst 440°C (824°F) or more
Vehicle speed Higher than 47.4 km/h (29.4 mph)
Heated oxygen sensor output voltage after fuel cut Higher than 0.55 V
Incorrect Purge Flow in ELCM 2nd stage monitor Off
Estimated temperature of secondary oxygen sensor element 500°C or higher
Atmospheric pressure 75.06 kPa [563 mmHg] or more