Circuit Description

Vapor pressure sensor and vapor pressure sensor Vacuum Switching Valve (VSV) are used to detect faults in EVAP system. DTC is set if EVAP system leak is detected or vapor pressure sensor malfunctions. Possible causes are:

• Damaged, disconnected or blocked vacuum hose.
• Fuel cap is incorrectly installed.
• Defective fuel cap.
• Damaged fuel tank.
• Defective charcoal canister.
• Vapor pressure sensor circuit is open or shorted.
• Defective vapor pressure sensor.
• Defective ECM.