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Home >> Lexus >> 2006 >> ES 330 >> Repair and Diagnosis >> Engine Performance >> System >> SFI System - Diagnostics >> DTC P0446: Evaporative Emission Control System Vent Control Circuit >> Typical Enabling Conditions
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Typical Enabling Conditions

ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present See LIST OF DISABLE A MONITOR 
Altitude Below 2,400 m (8,000 ft)
Battery voltage 11 V or more
Throttle position learning Completed
FTP sensor No malfunction
(Engine start IAT) - (Engine start ECT) -7 to 11.1°C (-12.6 to 20°F)
EVAP VSV, CCV Not operated by scan tool
Either of the following conditions 1 or 2 is met -
1. Purge duty cycle 6 % or more when intake air amount is 12 g/sec or more
2. Purge concentration for 30 seconds -5 %/% or more when vehicle speed is less than 10 km/h (6 mph)
Refuel during EVAP system monitor Not refueled with engine running
FTP before EVAP system monitor -1.7 kPa (12.75 mmHg) or more
Engine start ECT 4.4 to 35°C (40 to 95°F)
Engine start IAT 4.4 to 35°C (40 to 95°F)
IAT 4.4°C (40°F) or more
Vehicle speed Steady speed
Fuel slosh No sloshing (i.e., fairly smooth road)
Time after engine start Below 50 minutes
FTP change before vacuum introduction Minimum change
Fuel tank level Below 90 %