Solving P0455 on Your 2023 Hyundai Palisade
A P0455 on your 2023 Palisade means the ECM detected a large EVAP leak. Your refreshed Palisade with the 3.8L V6 is under warranty. Check the gas cap first.
Symptoms
- Check engine light with P0455
- Possible faint fuel smell
- Gas cap not clicking
- EVAP monitor incomplete
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or defective. Warranty-covered.
- Canister Close Valve (Medium Likelihood): Hyundai's vent valve. Warranty-covered.
- Purge Control Solenoid (Medium Likelihood): Stuck open. Warranty-covered.
- Vapor Line (Low Likelihood): Factory connection issue. Warranty-covered.
- Charcoal Canister (Low Likelihood): Rare defect. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit a Hyundai dealer for free repair.
Warranty Coverage
Your 2023 Palisade is covered by Hyundai's 5-year/60,000-mile warranty through 2028 and the federal emissions warranty (8yr/80k) through 2031.
Safe to Drive?
Yes. P0455 doesn't affect the Palisade's V6, 8-speed, AWD, or any features.