Here is a video on how to fix engine code p0449
The DTC P0449 is: EVAP Emission Control System Vent Vlv/Sol Malf Straight out of my code book. Hope this helps you out.
The most probable cause is a vacuum leak or a bad fuel cap. Inspect all the vacuum hoses for damage and buy a new fuel cap, making sure it is tightly on the vehicle.
Yeah, it almost has to be a bad vent solenoid, or a broken connection in the wiring to it. This code is saying that the PCM is not seeing the voltage change when it grounds the vent solenoid to activate it. Should have system voltage at one terminal with the ignition on, and a ground at the other terminal when the PCM commands the vent valve open.
P0449 says that the PCM is not seeing the voltage potential it wants to see when the vent valve is off or commanded on. I would suspect it is the Evaporative Emissions (EVAP) Canister Vent Solenoid near or on top of the gas tank is bad. To make sure check the voltage at the pink wire. It should be around 12 volts. If it is low, it may be bad wiring or the PCM, but not likely. if you have 12 volts suspect the solenoid.
it depends on how much damage was caused
install updated vent control solenoid valve and jumper harness.
A lot of money wasted!
it costs a lot of money.
Call a plumber or a contractor. Sometimes it would be too much money to fix or too much problem. If you do decide to buy the house, see if they will fix the problem or take some money off of the price, and with the money saved you can fix it:)
How fix code P1140
Depends on where it is leaking.