P0446 Nissan Sentra
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 Nissan Sentra 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 Nissan Sentra.
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 Nissan Sentra.
Common Causes on Nissan Sentra
- Failed EVAP vent control valve
- Clogged charcoal canister vent line
- Damaged vent valve wiring or connector
- Debris or spider webs blocking the vent outlet
Symptoms
- Check Engine Light on
- Difficulty filling fuel tank
- Possible fuel odor
- No driveability symptoms
Notes for Nissan Sentra
On Nissan vehicles, the vent control valve is under the vehicle near the fuel tank; inspect the vent hose for insect nests.