Skip the auto shop - Our mechanics make house calls

Q: P0446 trouble code

asked by on

Evap P0446 trouble code

My car has 131 miles.
My car has an automatic transmission.

A: Hi there, thanks for writing in. This P0446...

Hi there, thanks for writing in. This P0446 trouble code relates to the evaporation control system circuit, which is a restricted vent path for the EVAP (Emergency Vehicle Accident Prevention) system.

There is a solenoid in this circuit that sometimes can fail or get stuck not allowing the venting to work correctly which will trigger this code. In terms of fixing this, you will need to verify that there is power and ground to the solenoid. A scanning tool will be best to help you identify what specifically is going on. The vent solenoid is underneath the car above the rear axle area. There should be a black plastic canister which is the EVAP canister. The vent solenoid will be attached to that with a red two-wire connector that attaches to it.

Keep in mind that replacing this may not necessarily clear the code right away, as the EVAP system can take some time to run tests through the computer. If you’d like help with this, consider having one of our certified automotive technicians from YourMechanic come to your home or office to inspect, diagnose, and repair this issue 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: My car overheated and now won't start.

Do try to get the car running soon because once you get in the three month plus range, any gasoline in the vehicle's fuel tank will go bad and that will create additional problems. Also, obviously, once you get the...

Q: in my car where and how can i locate the ECM

First, why do you want to replace the PCM and/or BCM? It's very rare that a module goes bad. The problem is usually something else. I recommend having a professional, such as one from YourMechanic, diagnose and repair your vehicle;...

Q: My car has an electrical issue - 2003 Chevrolet Malibu

Hello there. Your 2003 Chevrolet Malibu only starting when a scanner is plugged in is an abnormal issue. There are a few faults that can cause this type of issue. Most likely would be a short in the wiring harness,...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.