Probable Cause

Malfunction is detected when EVAP system has a large leak or does not operate properly. Possible causes are:

• Fuel filler cap open or leaking.
• Incorrect fuel tank vacuum relief valve.
• Incorrect fuel filler cap.
• Foreign matter in fuel filler cap.
• Leak in hose between intake manifold and EVAP Canister Purge Volume Control Valve (EVAP-CPVCV).
• Foreign matter in EVAP Canister Vent Control Valve (EVAP-CVCV).
• Leak in EVAP canister or fuel tank.
• Leak or blockage in EVAP purge line.
• Leak or blockage in hose to EVAP Control System Pressure Sensor (EVAP-CSPS).
• Defective EVAP-CVCV or circuit.
• Defective EVAP-CPVCV or circuit.
• Defective EVAP-CSPS.
• Defective fuel tank temperature sensor.
• Leak between EVAP canister and EVAP-CVCV.