Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Highlander. 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 EVAP system leak is detected or if there is a malfunction in EVAP VSV, pressure switching valve VSV or in vapor pressure sensor. Possible causes are:
- Damaged, disconnected or blocked vacuum hose(s).
- Fuel tank cap is installed incorrectly.
- Defective fuel tank cap.
- Vapor pressure sensor circuit is open or shorted.
- Defective vapor pressure sensor.
- EVAP VSV circuit is open or shorted.
- Defective EVAP VSV.
- Canister closed valve VSV circuit is open or shorted.
- Defective canister closed valve VSV.
- Pressure switching valve VSV circuit is open or shorted.
- Defective pressure switching valve VSV.
- Damaged fuel tank.
- Defective charcoal canister.
- Fuel tank overfill valve cracked or damaged.
- Defective ECM.