Diyvehiclerepair
P0446: Evaporative Emission Control System Vent Control Circuit. ... This generic OBD-II code indicates that the evaporative vent valve in the emission control system is malfunctioning. When this occurs, the EVAP system may not be capable of pressurizing and maintaining a vacuum seal.
- How do I fix error code P0446?
- Where is the EVAP vent valve located?
- Is P0446 serious?
- What is code P0449 on Chevy?
- What is a EVAP canister vent control valve?
- How much does it cost to replace a vent valve?
- Can you drive with a bad purge valve?
- How do I know if my EVAP purge valve is bad?
- What could cause a P0442 code?
- What is code P0446 Chevy?
- Can a bad vent solenoid symptoms?
How do I fix error code P0446?
Gas caps are relatively inexpensive and are often the fix for code P0446. If the fuel cap didn't fix it, perform an EVAP system leak check: Pinch off the vent tube to the EVAP Vent Control Valve. Pressurize the EVAP system with an EVAP smoke machine leak checker.
Where is the EVAP vent valve located?
In most cars, the EVAP vent valve is located underneath the vehicle, close to or at the charcoal canister near the fuel tank, see the photo. For that reason, it often fails due to corrosion. The most common problem with the vent valve is when it sticks open or fails.
Is P0446 serious?
Is Code P0446 Serious? The P0446 code won't put you in any immediate danger. You can still drive your vehicle if you see this code. Other than the check engine light, you may experience reduced fuel economy.
What is code P0449 on Chevy?
The P0449 DTC means that the evaporative emission control system vent valve or solenoid has a malfunction. The ECU detects this fault and causes the Check Engine Light to be illuminated on the dashboard.
What is a EVAP canister vent control valve?
The purpose of the canister vent valve, also called simply the vent valve, is to control the flow of air into and out of the Evaporative Emission Control (EVAP) system, a feature on all modern cars. The EVAP system collects and stores fuel vapors in a charcoal canister.
How much does it cost to replace a vent valve?
To have your canister purge valve replaced, you will pay anywhere between $110 and $170. The parts are the expensive component here, as they will run between $75 and $110. The labor, on the other hand, usually only costs about $50, meaning this is a rather quick and straightforward procedure.
Can you drive with a bad purge valve?
It's certainly possible to drive with a broken purge valve, but we don't recommend it. The longer you drive with a bad valve, the more risk you run of damaging the vehicle's EVAP system and other parts. There's also the possibility of wasting fuel and pumping out more emissions than is necessary.
How do I know if my EVAP purge valve is bad?
On top of a rough idle, a vehicle with a failing EVAP canister purge valve will display signs of poor engine performance. The engine may feel like its running “weak” and won't generate sufficient power for acceleration. Accelerating will feel like you're pressing the pedal down and moving slower.
What could cause a P0442 code?
The most common causes of P0442 code are the following: Malfunctioning fuel cap. Leak or damage in the EVAP system line. Leak or damage in the charcoal canister.
What is code P0446 Chevy?
Code P0446 means the car's computer has detected a problem with the EVAP system vent valve. The EVAP system is primarily composed of the gas tank, gas cap, vent valve, purge valve, and charcoal canister.
Can a bad vent solenoid symptoms?
Common signs include the Check Engine Light coming on, pressure in the gas tank, and failing an emissions test.
