P0446 Hyundai Elantra
EVAP Vent Control Circuit Malfunction · Powertrain Code · Low · Repair: Moderate
What is P0446?
The EVAP vent control circuit has an electrical issue preventing proper vent valve operation.
When the Hyundai Elantra triggers code P0446 (evap vent control circuit malfunction), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Hyundai Elantra.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Hyundai Elantra.
Common Causes on Hyundai Elantra
- Failed EVAP vent control valve (stuck open or closed)
- Clogged charcoal canister vent filter
- Damaged wiring to the EVAP vent valve
- Spider webs or debris blocking the canister vent line
Symptoms
- Check Engine Light on
- Fuel tank may be hard to fill
- Possible fuel odor
- No driveability symptoms
Notes for Hyundai Elantra
The vent valve is usually mounted under the vehicle near the fuel tank; inspect for road debris blocking the vent.