This ODB code could indicate a problem with any part of the evaporative emission control system: gas cap, rubber hoses, canister, or purge solenoid.
Evaporative Emission Control System Malfunction
Trouble code P0440 means: Evaporative emission control system malfunction
http://www.obd-codes.com/p0440
Trouble code P0440 means: Evaporative Emission System
Trouble code P0440 means: Evaporative Emission System
Trouble code P0440 means: Evaporative Emission (EVAP) System - Continuous Purge Flow
Generic codes P0440 Evaporative emission system malfunction P0401 Exhaust gas recirculation system Insufficient flow detected.
Evaporative Emission Control System MalfunctionCausesThe gas cap is not installed or working properlyThe purge solenoid has failedThe canister is plugged and not working properly
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means:Evaporative emission control system malfunction