The vapor pressure sensor, VSV for EVAP and VSV for CCV are used to detect abnormalities in the evaporative emission control system.
The ECM judges whether there abnormalities exit in the evaporative emission control system, based on the signals from the vapor pressure sensor.
If evaporative emissions leak from the components specified within the dotted line (Leak Detection Area) in (Scheme 475) or the vapor pressure sensor malfunctions, ECM records DTC P0442 or P0456.
