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Home/DTC Codes/Mazda/CX-3/2016-2021 2.0L I4/P0446
P0446

EVAP Vent Control Circuit

2016-2021 Mazda CX-3 2.0L I4

Low SeverityPowertrainGeneric (SAE)

Description

Malfunction in the EVAP vent control circuit. The vent valve controls airflow to the charcoal canister.

Symptoms

  • Check Engine Light
  • Fuel tank pressure issues
  • Difficulty refueling

Common Causes

  • Faulty vent valve
  • Blocked vent filter
  • Wiring issue
  • Spider webs/debris in vent hose

Diagnostic Steps

  1. Test vent valve operation
  2. Inspect vent filter
  3. Check wiring
  4. Inspect vent hose for blockage

Repair Notes

Replace vent valve or clean vent. Check for debris in vent hose.

Related Codes

P0440Evaporative Emission Control System MalfunctionP0449EVAP Vent Valve/Solenoid Circuit

Other Powertrain Codes

P0446 on Other Vehicles

Mazda 626

1993-1997 2.0L I4

Mazda 626

1993-1997 2.5L V6

Mazda 626

1998-2002 2.0L I4

Mazda 626

1998-2002 2.5L V6

Mazda Axela

2013-2019 1.5L I4 P5-VPS

Mazda B2300

1994-1997 2.3L I4

Mazda B2300

2002-2009 2.3L I4

Mazda B2500

1998-2001 2.5L I4

Common Questions

What does code P0446 mean on a 2016-2021 Mazda CX-3?

P0446 stands for "EVAP Vent Control Circuit". Malfunction in the EVAP vent control circuit. The vent valve controls airflow to the charcoal canister.

What are the symptoms of P0446 on a Mazda CX-3?

Common symptoms of P0446 include: Check Engine Light, Fuel tank pressure issues, Difficulty refueling.

What causes P0446 on a 2016-2021 Mazda CX-3?

Common causes of P0446 include: Faulty vent valve, Blocked vent filter, Wiring issue, Spider webs/debris in vent hose.

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