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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 463 (Engine Control System (SFI) - Diagnostics) >> DTC P0442: Evaporative Emission Control System Leak Detected (Small Leak); DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
MONITOR STRATEGY TABLE

DTCs P0442 Small leak (0.040 inch or more hole) detected
P0456 Very small leak (0.020 inch hole) detected
Required sensors/components Main Vapor pressure sensor
Sub Mass air flow sensor, engine coolant temperature sensor, VSV for EVAP (purge VSV), VSV for CCV
Frequency of operation Once per drive cycles
Duration 60 seconds
MIL operation 2 drive cycles
Sequence of operation None
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