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2005-2011 AUDI A6
4.2L V8•AWD•AUTOMATIC•gas•BAT
5 active safety recalls on this vehicle — view recalls
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Repairs0Labor504Torque2218Fluid10DTC1115Battery1Maintenance0Recalls5
P0446low severityPowertrain

EVAP Vent Control Circuit

on 2005-2011 Audi A6 4.2L V8 · AWD

What this code means

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.

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