P0446 — Evaporative Emission System Vent Control Circuit
| Meaning | The engine computer has detected a problem in the electrical circuit that controls the vent valve for the fuel vapor recovery system. This system is designed to capture fuel vapors from the tank and prevent them from escaping into the atmosphere, routing them back into the engine to be burned. |
| Family | Powertrain (P) |
Typical symptoms
Difficulty when trying to refuel the car at the gas station pump
Common causes
Corroded, damaged, or loose electrical wiring and connectors at the vent valve
Blocked or pinched vent hose preventing proper airflow
What to do
Frequently asked questions
What does code P0446 mean?
Evaporative Emission System Vent Control Circuit. The engine computer has detected a problem in the electrical circuit that controls the vent valve for the fuel vapor recovery system. This system is designed to capture fuel vapors from the tank and prevent them from escaping into the atmosphere, routing them back into the engine to be burned.
Can I keep driving with code P0446 active?
Yes, no known limitation
Common causes — P0446
Faulty vapor canister vent valve or solenoid Corroded, damaged, or loose electrical wiring and connectors at the vent valve Blocked or pinched vent hose preventing proper airflow
How do you fix code P0446?
You should have a mechanic inspect the wiring and the vent valve itself underneath the rear of the vehicle. While the car will still drive, it is best to check it soon, especially if you notice problems during refueling.
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