Tracking Down P0455 on Your 2022 Hyundai Tucson
A P0455 on your 2022 Tucson means the ECM found a large EVAP leak. Your all-new 4th-generation Tucson is well within Hyundai's 5-year warranty. Check the gas cap first.
Evidence
- Check engine light with P0455
- Possible fuel odor
- Gas cap not clicking
- Emissions monitor incomplete
Causes by Probability
- Gas Cap Seal (Very High Likelihood): Loose or worn. Tighten or replace. 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): Cracked or disconnected. Warranty-covered.
- Charcoal Canister (Low Likelihood): Saturated. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit a Hyundai dealer—all free under warranty.
Warranty Coverage
Hyundai's 5-year/60,000-mile warranty runs through 2027. The federal emissions warranty (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the Tucson's engine, DCT/8-speed, AWD, or hybrid system.