Circuit Description
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
Vapor pressure sensor, canister closed valve Vacuum Switching Valve (VSV) and pressure switching valve VSV are used to detect faults in EVAP system. The ECM decides whether there is an abnormality in the evaporative emission control system based on the vapor pressure sensor signal. Possible causes are:
- Open or short in vapor pressor sensor circuit.
- Faulty vapor pressure sensor.
- Faulty ECM.