Circuit Description
WARNING: This page is about a different car, the 2003 Lexus LX 470. 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. DTCs are set if vapor pressure sensor output changes or if leak is detected in EVAP system. See Figure and Figure . Possible causes are:
- Hose or tube cracked, damaged or loose seal.
- Fuel tank cap incorrectly installed.
- Fuel tank cap cracked or damaged.
- Vacuum hose.
- Fuel tank cracked or damaged.
- Charcoal canister cracked or damaged.
- Open or short in vapor pressure sensor circuit.
- Vapor pressure sensor.
- Faulty ECM.