EVAP Vent Control Circuit
The EVAP vent control valve circuit is malfunctioning.
Informational only. Consult a qualified mechanic.
- Faulty vent valve
- Blocked vent line
- Spider webs in vent
Inspect and replace the vent valve.
What does P0446 mean?
The P0446 OBD-II diagnostic trouble code (DTC) indicates: evap vent control circuit. This is a low-severity powertrain code that your vehicle's onboard diagnostics system triggers when the evap vent control valve circuit is malfunctioning. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
Use Your Service Book to log this diagnostic trouble code to your vehicle's service history, track repairs, and get maintenance reminders — all for free.
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