P0440 is an OBD-II generic code that the engine control module (ECM) has detected a leak in the fuel tank vapor system or a vapor pressure sensor has malfunctioned.
SOURCE: oem code p2716
Same issue.
There is a service bulletin on this. Toyota will replace computer. I have a 2007 Corolla S with 56,000 miles
SOURCE: Check engine light on came on in my 2005 VW Jetta
There may be a possiblity of doing damage to the turbo if you continue to drive it this way. I would recommend either taking it to the dealer or a reputable repair shop in your area to have this repaired as soon as possible, as to not risk damaging the turbo. Hope this helps.
SOURCE: p0446 code
Hi, check out this article, it's detailed on what to check: http://www.obd-codes.com/p0446
SOURCE: I have a 2005 Chevy Malibu. The check engine
"This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake
vacuum to siphon the fuel vapors into the engine."
Hope that helps..
SOURCE: toyota seinna po440, po441, po446
you have to understand that there is a leak in the system other than the gas cap for the evaporative system. The system needs to be professionally closed, and smoke introduced into to find the leak, and a through component check, eg.. purge valve vapor canister vent solenoid all functioning correctly
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