P0456 on Your 2024 Tucson: Warranty Handles It
Your 2024 Tucson (4th generation, NX4) has triggered P0456—a very small EVAP leak. Whether you have the 2.5L MPI, 1.6L turbo hybrid, or plug-in hybrid, the EVAP system uses a standard threaded gas cap. Hyundai's generous warranty makes this a zero-cost repair.
Symptoms
- Check engine light on
- P0456 stored
- No performance or AWD issues
- Hybrid system (if equipped) works normally
Causes
- Gas Cap Seal (High Likelihood): Loose cap. $0 warranty.
- Purge Control Solenoid Valve (High Likelihood): Component variance. $0 warranty.
- Canister Close Valve (Medium Likelihood): Vent control. $0 warranty.
- EVAP Connection (Medium Likelihood): Factory assembly. $0 warranty.
- Software Update (Low Likelihood): ECM calibration. $0 warranty.
What to Do
- Reseat gas cap
- Schedule Hyundai dealer warranty appointment
- Free diagnosis and repair
Cost
- Under warranty: $0
- Bumper-to-bumper: 5yr/60k (through 2029)
- Federal emissions: 8yr/80k (through 2032)
Can I Drive?
Yes. P0456 has zero impact on the Tucson's performance, AWD, hybrid system, or any feature.
Warranty
Hyundai's 5yr/60k through 2029. 10yr/100k powertrain. Federal emissions 8yr/80k through 2032. Let the dealer handle it.