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OBD-II Code

P0446 — Evaporative Emission Control System Vent Control Circuit Malfunction

A general malfunction is detected in the EVAP vent control circuit, preventing proper tank ventilation.

System Engine
Severity Low
Safe to drive? Yes, with caution
Advanced scanner Not necessarily

What does code P0446 mean?

A general malfunction is detected in the EVAP vent control circuit, preventing proper tank ventilation.

Common symptoms

  • Difficulty refueling
  • fuel odor
  • possible check engine light

Possible causes

  • Stuck vent valve
  • faulty vent solenoid
  • clogged vent filter

Initial recommendation

Inspect vent valve operation, clean or replace vent filter and check wiring.

Safety notice

This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.

Analyze this code with MecaOBD

Use the app to combine code P0446 with your vehicle's actual symptoms for more complete diagnostic guidance.

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