P0455 on Your 2023 Mazda CX-9
A P0455 on your 2023 CX-9 means a large EVAP leak. As the final year of the CX-9, your 2.5 Turbo is likely under warranty. Gas cap is the first clue.
Symptoms
- Check engine light with P0455
- Possible fuel smell
- Gas cap issue
- EVAP monitor incomplete
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or defective. Warranty-covered.
- Purge Solenoid Valve (Medium Likelihood): Mazda purge valve. Warranty-covered.
- Canister Vent Valve (Medium Likelihood): Factory defect. Warranty-covered.
- Vapor Hose (Low Likelihood): Assembly issue. Warranty-covered.
- Charcoal Canister (Low Likelihood): Rare. Warranty-covered.
Warranty
Your 2023 CX-9 is under Mazda's 3-year/36,000-mile warranty through 2026. Federal emissions (8yr/80k) covers EVAP through 2031.
Safe to Drive?
Yes. P0455 doesn't affect the turbo, AWD, towing, or 3-row features.