ShopBaseFree forever shop management software for auto repair shops
Try ShopBase Free →
Home/DTC Codes/Chevrolet/Impala/2000-2005 3.4L V6/P0446
P0446

EVAP Vent Control Circuit

2000-2005 Chevrolet Impala 3.4L V6

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

Chevrolet Astro

1995-2005 4.3L V6 Vortec

Chevrolet Avalanche

2002-2006 5.3L V8 Vortec

Chevrolet Avalanche

2002-2006 8.1L V8 Vortec

Chevrolet Avalanche

2007-2013 5.3L V8 Vortec

Chevrolet Avalanche

2007-2013 6.0L V8 Vortec

Chevrolet Aveo

2012-2018 1.6L I4

Chevrolet Beat

2018-2021 1.2L I4

Chevrolet Beretta

1990-1996 2.2L I4

Common Questions

What does code P0446 mean on a 2000-2005 Chevrolet Impala?

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 Chevrolet Impala?

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

What causes P0446 on a 2000-2005 Chevrolet Impala?

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

View Labor Times | View Torque Specs | View Fluid Specs