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. DTC is set if vapor pressure sensor output changes or if leak is detected in EVAP system. Possible causes are:
- Hose or tube cracked, damaged or loose seal.
- Fuel tank cap incorrectly installed.
- Fuel tank cap cracked or damaged.
- Faulty vacuum hose.
- Fuel tank cracked or damaged.
- Charcoal canister cracked or damaged.
- Open or short in vapor pressure sensor circuit.
- Faulty vapor pressure sensor.
- Fuel tank overfill check valve cracked or damaged.
- Faulty ECM.