What does code P0446 mean on a Ford and is it safe to drive?
P0446: Evaporative Emission System Vent Control Circuit. Here's what it means on your Ford, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
The PCM has detected a problem with the EVAP vent control circuit, often caused by a stuck or failed vent valve.
Common causes for your Ford
- Failed EVAP vent solenoid
- Corroded wiring or connector at vent valve
- Blocked vent due to dust, rust, or spider webs
Symptoms
- Check Engine Light
- Possible difficulty filling fuel tank (nozzle keeps clicking off)
Typical fixes
- Replace EVAP vent valve/solenoid
- Clean or clear vent and charcoal canister area
- Repair wiring
Repair cost range
For a Ford, repairs for P0446 often fall between $150 and $450, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Ford
Ford P0446 usually means the canister vent solenoid has failed. On F-150, it's mounted near the charcoal canister under the truck bed. The solenoid is inexpensive—replace it and confirm the vent line is not cracked or kinked.
Most commonly affected models
F-150 1999–2007Explorer 2002–2005Mustang 2005–2009