P0446: Evaporative emission system vent control circuit
You can keep driving. Get it checked when convenient.
Can I drive with P0446?
Yes, you can keep driving. The canister vent valve at the rear undercarriage has an issue; safe to keep driving.
What does P0446 mean?
P0446 stands for Evaporative Emission Control System Vent Control Circuit Malfunction.
Symptoms you may notice
- Steady check engine light with minimal drivability symptoms
- Normal engine power, idle, and acceleration
- Possible faint gasoline vapor smell near gas cap
How much does it cost to fix?
Repair costs for code P0446 depend on the specific underlying root cause, ranging from simple DIY checks to component replacement. The table below lists the most common causes and rough price ranges in USD:
- Defective EVAP canister vent solenoid valve
- Corroded wiring plug near rear fuel tank
- Dirt or spider webs clogging the vent tube filter
- Damaged underbody wiring harness
What to do next
- Inspect the vent solenoid located near the spare tire or gas tank.
- Check the electrical connector for road salt corrosion or bent pins.
- Replace the vent valve solenoid and clear the trouble codes.
Last updated: October 2026
Related codes
General guidance only, not a professional diagnosis. If the check-engine light is flashing, or the car is running rough, overheating or losing power, stop driving and get help.
About this code
Code P0446 is an electrical or flow restriction code for the EVAP canister vent valve, which is usually tucked underneath near the fuel tank. Because it sits in the spray of wet roads and winter road salt, road grime often corrodes the pins or jams the valve. It is minor, but get it checked to engine operation.