Circuit Description

Vapor pressure sensor and Vacuum Switching Valve (VSV) for vapor pressure sensor 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:

• Open or short in VSV circuit for vapor pressure sensor.
• Open or short circuit in vapor pressure sensor circuit.
• VSV for vapor pressure sensor.
• Vapor pressure sensor.
• VSV for EVAP.
• Open or short in VSV circuit for EVAP.
• Disconnected or blocked vacuum hose.
• Charcoal canister.