Skip the auto shop - Our mechanics make house calls

Q: Trying to pass emissions test. Failed once. Code P0449

asked by on

Trying to pass emissions test, failed, code P0449 showed up. Changed charcoal canister, vapor canister vent solenoid, gas cap, cleaned corrosion out of EVAP electrical connection cleared code and light came back on after 25KM, cleared and comes up yellow. Not passing emissions My car has 94000 miles.
My car has an automatic transmission.

Hello, thank you for writing in. Code P0449 will set when the system sees that the position of the vent valve, and the voltage for its position, do not match. There could be a wiring problem, a faulty hose, or a failed component. The code only gives a general idea of the area affected, so that a certified mechanic knows where to start a diagnostic procedure. The mechanic should have the specialty tools and techniques to pinpoint what exactly is causing the issue. If you need help identifying and repairing the issue, YourMechanic.com offers several options. We have trained mechanics that can come to your home, or place of business, and perform the diagnosis and repairs for you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: All my gears work but drive and 3rd gear

Hello, thank you for writing in. The vehicle is likely experiencing issues with the transmission. The first step to take is having the vehicle scanned for diagnostic codes, and use them to help point you in the right direction. If...

Q: Car dies when slowing down

A stalling while driving issue can be caused by multiple problems dealing with one or more of the following issues: lack of air flow to the motor (which could be caused by a blockage in the intake system), lack of...

Q: Driving normal and my brakes start act up first noticed pull to passenger side then petal travels farther than normal

There are several possible causes for the brakes to pull to one side when applied. This could be caused by a sticking caliper, brake line leaking, compromised brake hose, a low tire pressure, a failed suspension component, a faulty master...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...