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 if there is a malfunction in EVAP VSV, vapor pressure sensor VSV or in vapor pressure sensor. Possible causes are:

• EVAP VSV circuit is open or shorted.
• Vapor pressure sensor VSV circuit is open or shorted.
• Vapor pressure sensor circuit is open or shorted.
• Defective EVAP VSV.
• Defective vapor pressure sensor VSV.
• Defective vapor pressure sensor.
• Disconnected, damaged or blocked vacuum hose.
• Defective charcoal canister.