Investigating P0455 on Your 2024 Mazda CX-90
A P0455 on your 2024 CX-90 means a large EVAP leak. Whether you have the 3.3L turbo inline-6 or PHEV, gas-powered variants all have EVAP systems. Full warranty coverage applies.
Symptoms
- Check engine light with P0455
- Possible fuel smell
- Gas cap not seating
- EVAP readiness incomplete
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- Purge Solenoid Valve (Medium Likelihood): Manufacturing issue. Warranty-covered.
- Canister Vent Valve (Medium Likelihood): Factory defect. Warranty-covered.
- Vapor Hose (Low Likelihood): Assembly issue. Warranty-covered.
- PCM Software (Low Likelihood): Calibration update for new platform. Warranty-covered.
CX-90 Note
The CX-90 is Mazda's flagship on the new rear-drive-based platform. As a first-generation model, software calibration updates are common. The dealer may check for TSBs related to EVAP monitoring.
Warranty
Your 2024 CX-90 is covered by Mazda's 3-year/36,000-mile warranty through 2027. Federal emissions (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 doesn't affect the inline-6 turbo, i-ACTIV AWD, towing, or 3-row features.