Solving P0446 on Your 2024 Mazda CX-50
A P0446 code on your 2024 Mazda CX-50 indicates an EVAP vent control circuit malfunction. The CX-50 with its Skyactiv-G 2.5L engine (available turbo) uses a canister vent shut valve for EVAP management. The PCM has detected a circuit fault.
Under full Mazda warranty, this is a dealer repair at no cost. The CX-50 benefits from production refinement since its launch.
Symptoms Present
- 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. Warranty-covered.
What to Do
Take your CX-50 to a Mazda dealer. Under warranty, all diagnostics and repairs are free.
Full Warranty
Your 2024 CX-50 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-50's engine, transmission, AWD, towing, or off-road capability.