P0446Low urgency
EVAP Emission Control System Vent Control Circuit
Emission · EVAP System
✅ Safe to drive — fix before emissions test.
What this means
The EVAP vent valve circuit has a fault. The vent valve allows fresh air into the charcoal canister during purging. A failed vent valve can prevent the EVAP system from purging properly.
Likely causes
- Failed vent solenoidMost common
- Blocked vent hose or canisterCommon
- Wiring damageCommon
Estimated repair cost
Vent solenoid replacement$75 – $200
Charcoal canister replacement$150 – $400
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Frequently asked questions
What does P0446 mean?
The EVAP vent valve circuit has a fault. The vent valve allows fresh air into the charcoal canister during purging. A failed vent valve can prevent the EVAP system from purging properly.
Is P0446 serious?
Safe to drive — fix before emissions test.
How much does it cost to fix P0446?
Repair costs for P0446 range from $75 – $200 depending on the root cause and your vehicle.
Can I drive with P0446?
Yes, the vehicle is safe to drive. Schedule a repair at your convenience.