2008 Toyota P0446: What It Means & Is It Safe to Drive?
P0446 on the 2008 Toyota: 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 Toyota
- 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 Toyota, repairs for P0446 typically fall between $150 and $450, depending on the root cause and labor rates in your area.
Known issues on Toyota
Toyota P0446 points to the EVAP vent valve (canister close valve/CCV) mounted on or near the charcoal canister. Check the valve with a scan tool command; if it doesn't respond, replace it—it's inexpensive and this resolves P0446 in most cases.
Most commonly affected models
Camry 2002–20064Runner 2003–2009Tacoma 2005–2015