Diagnosing P0455 on Your 2024 Hyundai Tucson
A P0455 on your 2024 Tucson means the ECM detected a large EVAP leak. Your 4th-generation Tucson with the 2.5L engine or 1.6L turbo hybrid is fully under Hyundai's warranty. Check the gas cap first.
Symptoms
- Check engine light with P0455
- Possible faint fuel smell
- Gas cap not clicking
- EVAP monitor incomplete
Most Likely Causes
- Gas Cap (Very High Likelihood): Loose or not seated. Tighten until it clicks.
- Software Calibration (Medium Likelihood): ECM may need a Hyundai TSB update.
- Canister Close Valve (Medium Likelihood): Factory defect. Warranty replacement.
- Purge Control Solenoid (Low Likelihood): Stuck open. Warranty-covered.
- EVAP Line Fitment (Low Likelihood): Assembly issue. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit a Hyundai dealer for free diagnostics and repair.
Hybrid Note
If you have the Tucson Hybrid or PHEV, P0455 is still an EVAP system code—unrelated to the hybrid battery or electric motor.
Warranty Coverage
Your 2024 Tucson is covered by Hyundai's 5-year/60,000-mile warranty through 2029 and the federal emissions warranty (8yr/80k) through 2032.
Safe to Drive?
Yes. P0455 doesn't affect the Tucson's engine, transmission, AWD, or hybrid system.