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Have you checked the EGR valve? The P0449 EVAP code is normally or the purge solenoid on the intake. Unplug the line that feeds the EVAP system from the purge valve and connect a vacuum gage. It should flutter while it is activated. If not, that could be the culprit.
hi there
this code is for evap vent solenoid you can pick one up at your locall dealer or auto parts store after installing it i would reccomend that you run a hose up the transmission tunnel toi keep dirt and debris from clogging it up again thank you and have a great day hope this helps you
The first thing I would check is the fuel cap. Your vehicle uses a closed vent system to control the fuel vapors in the tank and then vent the vapors to the engine intake system to burn. so you have a leak either your purge/ vent solenoid is stuck or open all the time not allowing the on board diagnostics to run the test or you may a bad fuel cap, and it is venting to the atmosphere allowing the gross leak. The purge/ vent valve is under the vehicle next to the charcoal canister.
CODE PO449 -EVAP VENT SYSTEM PERFORMANCE CONDITION.POSSIBLE CAUSES. VENT SOLENOID CONTROL CIRCUIT IS OPEN OR SHORTED TO GROUND OR.VENT SOLENOID CONTROL CIRCUIT IS SHORTED TO SYSTEM POWER B+.OR VENT SOLENOID POWER CIRCUIT IS OPEN TEST THE ENG 1 FUSE.OR VENT SOLENOID IS DAMAGE OR HAS FAILED.OR PCM HAS FAILED.
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