DTC code
P0446
Evaporative Emission Control System Vent Control Circuit Malfunction
Technical guide
Symptoms
- Check engine light
- fuel smell
- EVAP issue
Probable causes
- EVAP vent control circuit fault
- faulty vent solenoid
- wiring fault
- blocked vent hose
Diagnostic steps
- Check vent solenoid wiring.
- Test solenoid.
- Check vent hose for blockage.
- Replace vent solenoid.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
Models most reported with this code (NHTSA)
Count of distinct owner complaints mentioning the code. US data — same engines, same failures.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0446
Nothing confirmed yet for this code. No guess is offered on purpose.
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