What usually causes it
- A stuck or failed vent valve
- A vent line clogged with dirt, mud, bugs or water
- Damaged wiring or a loose plug
- A damaged charcoal canister, the part that stores the fumes
P0446Starts at: OK to drive, fix when convenient
Fuel vapor vent valve circuit problem
The vent valve lets fresh air into the fuel vapor system. The computer found a problem with the valve or its wiring.
What to watch for
- Trouble filling the tank, with the pump clicking off again and again
- A strong smell of gas
- The fuel tank looks squeezed in or makes a hissing noise when you open the cap
Can I keep driving?
We rate P0446 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
Quick answers about P0446
What does P0446 mean?
Fuel vapor vent valve circuit problem. The vent valve lets fresh air into the fuel vapor system. The computer found a problem with the valve or its wiring.
Can I keep driving with P0446?
We rate P0446 as OK to drive, fix when convenient, as a starting point. Keep an eye on the signs below. If the light starts flashing, stop driving soon.
What usually causes P0446?
The most common causes, in order: A stuck or failed vent valve; A vent line clogged with dirt, mud, bugs or water; Damaged wiring or a loose plug; A damaged charcoal canister, the part that stores the fumes.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.