P0455 on Your 2024 Acura MDX
A P0455 on your 2024 MDX (YE1) means a large EVAP leak. Whether you have the standard 3.5L V6 or Type S 3.0L turbo V6, the vehicle is fully under Acura warranty. Gas cap first.
Symptoms
- Check engine light with P0455
- Possible fuel smell
- Gas cap not seating
- EVAP monitor incomplete
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or factory defect. Warranty-covered.
- Canister Vent Shut Valve (Medium Likelihood): Honda/Acura EVAP valve. Warranty-covered.
- Purge Solenoid (Medium Likelihood): Factory defect. Warranty-covered.
- Charcoal Canister (Low Likelihood): Manufacturing issue. Warranty-covered.
- Software Calibration (Low Likelihood): ECU update. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit your Acura dealer for free warranty diagnosis with HDS.
Warranty
Your 2024 MDX is covered by Acura's 4-year/50,000-mile warranty through 2028. Federal emissions (8yr/80k) extends through 2032.
Safe to Drive?
Yes. P0455 doesn't affect V6 power, SH-AWD, towing, or any features.