2008 Subaru P0446: What It Means & Is It Safe to Drive?
P0446 on the 2008 Subaru: Evaporative Emission System Vent Control Circuit. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe 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 on the 2008 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 2008 Subaru, repairs for P0446 typically fall between $150 and $450, depending on the root cause and labor rates in your area.
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