The Lemon IndexThe EVAP vent valve isn't working right.
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
Failed vent valve. Then: blocked vent filter; wiring fault.
Owners named P0446 in 28 complaints to the U.S. government, most often on the Toyota Corolla.
Cars owners report it on
Complaints that name P0446, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2001 Toyota Corolla · 2001 Toyota Camry · 2003 Toyota Corolla
The details
What P0446 means
The EVAP vent valve isn't working right.
Can I drive with P0446?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
18% of the owner complaints that name P0446 also say the car stalls or shuts off. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of P0446
- Failed vent valve
- Blocked vent filter
- Wiring fault
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Stalls or shuts off: 18% of complaints
- Loses power or goes into limp mode: 11% of complaints
- Fuel smell or fuel leak: 11% of complaints
- Transmission slips or shifts hard: 7% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report P0446 most
2001 Toyota Corolla (4), 2001 Toyota Camry (2), 2003 Toyota Corolla (2).
Related codes
P0445 P0448 P0443 P0449 P0442 P0441 P0440 P043F
Quick answers
What does P0446 mean?
Evaporative Emission System Vent Control Circuit. The EVAP vent valve isn't working right.
Can I drive with P0446?
Drive on, get it checked. You can usually keep driving. Have the code read at your next service or within a few weeks.
What causes P0446?
Failed vent valve; Blocked vent filter; Wiring fault.
Counts: NHTSA owner complaints whose text names P0446. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.