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Home >> Toyota >> 2006 >> Prius >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1NZ-FXE) >> SFI System >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> Typical Enabling Conditions

Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present P0011 (VVT system 1 - Advance)
P0012 (VVT system 1 - Retard)
P0031, P0032 (A/F sensor heater - Sensor 1)
P0037, P0038 (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, P0341 (CMP sensor)
P0351-P0354 (Igniter)
P0442 - P0456 (EVAP system)
P0500 (VSS)
P2196 (A/F sensor - Rationality)
P2A00 (A/F sensor - Slow response)
Battery voltage 11.5 V or more
Altitude Less than 2,400 m (8,000 ft)
Intake air temperature -10 °C (14°F) or more
Idle OFF
Engine speed Less than 3,200 rpm
Engine coolant temperature 75°C (157°F) or more
Estimated catalyst temperature conditions are met: 1 & 2
1. Upstream estimated catalyst temperature Less than 800°C (1,508°F), and 430°C (806°F) or more
2. Downstream estimated catalyst temperature Less than 675°C (1,292°F), and 290°C (554°F) or more
Fuel system status Closed-loop