Probable Causes

Probable causes are:

• Fuel filler cap improperly tightened or missing.
• Improper fuel cap relief pressure.
• Fuel overflow limiter valve failed.
• Purge line or vapor line blocked.
• Leak in fuel tank, purge line or vapor line.
• Purge solenoid failed.
• Ventilation solenoid failed.
• Fuel Tank Differential Pressure (FTDP) sensor failed.
• Leak in EVAP canister.
• EVAP canister clogged.