What does code P0446 mean on a Hyundai and is it safe to drive?
P0446: Evaporative Emission System Vent Control Circuit. Here's what it means on your Hyundai, 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 Hyundai
- 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 Hyundai, 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 Hyundai
Hyundai P0446 is typically a failed EVAP canister vent solenoid or a broken harness wire. The vent solenoid is mounted near the charcoal canister under the rear bumper area—inspect for physical damage and corrosion first.
Most commonly affected models
Sonata 2001–2005Elantra 2001–2006Tucson 2005–2009