What does code P0446 mean on a Subaru and is it safe to drive?
P0446: Evaporative Emission System Vent Control Circuit. Here's what it means on your Subaru, 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 Subaru
- 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 Subaru, 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 Subaru
Subaru P0446 typically means the canister vent valve (CVV) has failed. Confirm with scan tool actuation before replacing. On AWD models, the CVV connector can corrode from road spray—inspect connector condition first.
Most commonly affected models
Outback 2000–2006Forester 2001–2006Impreza 2002–2007