Severity: Low
Safe to drive. Schedule a diagnosis soon.
What P0446 means
Problem with the EVAP vent valve or its circuit.
Symptoms
- Hard to refuel (pump clicks off) in some cases
Common causes
Most likely first
- 1Vent valve stuck or clogged with dirt
- 2Wiring or connector fault
- 3Spider webs or debris in the vent filter
How we diagnose it
- Command the vent valve
- Check circuit voltage and ground
Every vehicle sets codes under its own conditions. We check the factory diagnostic steps and service bulletins for your VIN, so the repair targets the actual cause.