Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Prius. 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 purge flow switching valve Vacuum Switching Valve (VSV) are used to detect abnormalities in the EVAP system. DTC is set if a leak is detected in EVAP system, or when malfunction exists with the canister closed valve VSV, EVAP VSV, purge flow switching valve VSV or vapor pressure sensor. Canister closed valve VSV may also be referred to as CCV VSV. Possible causes are:
- Vapor pressure sensor circuit is open or shorted.
- Defective vapor pressure sensor.
- EVAP VSV circuit is open or shorted.
- Defective EVAP VSV.
- Purge flow switching valve VSV circuit is open or shorted.
- Defective purge flow switching valve VSV.
- Canister closed valve VSV circuit is open or shorted.
- Defective canister closed valve VSV.
- Damaged, disconnected or restricted vacuum hose(s) or tubes.
- Fuel tank cap is loose or improperly installed.
- Defective fuel tank cap.
- Damaged fuel tank filler pipe or fuel tank.
- Defective charcoal canister.
- Defective ECM.