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Home >> Toyota >> 2007 >> Yaris Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions
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Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS

Monitor runs whenever following DTCs not present PO011 (VVT System 1 - Advance)
P0012 (WT System 1 - Retard)
P0031, 32 (A/F Sensor heater - Sensor 1)
P0037, 38 (02 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 27 g/sec
(b) Estimated front catalyst temperature 620° to 800°C (1,148° to 1,472°F)
(c) Estimated rear catalyst temperature 400° to 900°C (752° to 1,652°F)
Rear HO2 sensor heater monitor Completed
Shift position 4th or 5th (M/T)
3rd or 4th (A/T)
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