P0446 is a generic OBD-II trouble code that means: Evaporative Emission (EVAP) System – Vent Control Circuit Malfunction. Usually yes in the short term. The car normally runs fine, but fix it soon to avoid failing an emissions test or causing further problems.
What does P0446 mean?
P0446 is a generic OBD-II trouble code that means: Evaporative Emission (EVAP) System – Vent Control Circuit Malfunction. The engine control module (ECM) stores this code when it detects a fault related to: Evaporative Emission (EVAP) System.
Can I still drive?
Usually yes in the short term. The car normally runs fine, but fix it soon to avoid failing an emissions test or causing further problems.
Symptoms
- Check engine light is on
- Fuel smell
- Failed emissions test
- Often no noticeable drivability symptoms
Common causes
- Loose, damaged or missing fuel cap
- Faulty purge or vent valve
- Damaged wiring or a loose/corroded connector
How to fix it
- Read all stored codes and freeze-frame data with an OBD-II scanner
- Tighten or replace the fuel cap
- Check for vacuum and intake leaks (a smoke test is the fastest method)
- Replace the faulty component with a quality part
- Clear the code and road-test the car to confirm the repair
Frequently asked questions
What does code P0446 mean?
P0446 is a generic OBD-II trouble code that means: Evaporative Emission (EVAP) System – Vent Control Circuit Malfunction. The engine control module (ECM) stores this code when it detects a fault related to: Evaporative Emission (EVAP) System.
What causes code P0446?
The most common causes are: Loose, damaged or missing fuel cap; Faulty purge or vent valve; Damaged wiring or a loose/corroded connector.
How do I fix code P0446?
Start with these steps: Read all stored codes and freeze-frame data with an OBD-II scanner; Tighten or replace the fuel cap; Check for vacuum and intake leaks (a smoke test is the fastest method); Replace the faulty component with a quality part.
Is it safe to drive with code P0446?
Severity: Low. Usually yes in the short term. The car normally runs fine, but fix it soon to avoid failing an emissions test or causing further problems.