2010 Acura P0446: What It Means & Is It Safe to Drive?
P0446 on the 2010 Acura: 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 2010 Acura
- 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 2010 Acura, repairs for P0446 typically fall between $150 and $450, depending on the root cause and labor rates in your area.
Known issues on Acura
Acura P0446 EVAP vent valve fault follows Honda's canister vent valve diagnosis. Test the vent valve electrically before replacing. On MDX and Pilot, the vent valve is accessible from under the rear of the vehicle near the spare tire.
Most commonly affected models
TL 2004–2008MDX 2003–2006RDX 2007–2012