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