Solving P0446 on Your 2024 Mazda CX-30
A P0446 code on your 2024 Mazda CX-30 indicates an EVAP vent control circuit malfunction. The CX-30 uses the Skyactiv-G 2.5L engine (naturally aspirated or turbo) with a canister vent shut valve. The PCM has detected a circuit fault.
Under full Mazda warranty, this is a dealer repair at no cost. Mazda's Skyactiv EVAP system is reliable, making P0446 an uncommon but easily resolved issue.
What You're Seeing
- Check engine light on with P0446
- Fuel fill difficulties
- EVAP readiness monitor incomplete
- Possible companion codes
Likely Causes
- Canister Vent Shut Valve Defect (High Likelihood): Individual component defect. Warranty-covered.
- PCM Software Calibration (High Likelihood): EVAP monitoring updates may be available. Warranty-covered.
- Purge Solenoid Valve Issue (Medium Likelihood): Purge valve defect. Warranty-covered.
- EVAP Circuit Connector (Medium Likelihood): Factory connector issue. Warranty-covered.
- Gas Cap Seal (Low Likelihood): Factory fit issue. Warranty-covered.
What to Do
Take your CX-30 to a Mazda dealer. Under warranty, Mazda IDS diagnostics and all repairs are free.
Full Warranty
Your 2024 CX-30 is covered by Mazda's 3-year/36,000-mile basic, 5-year/60,000-mile powertrain, and federal emissions warranty (8yr/80k). All EVAP repairs are free.
Safe to Drive?
Yes. P0446 doesn't affect your CX-30's engine, transmission, AWD, or any driving system.