Investigating P0456 on Your 2022 Tucson
Your 2022 Tucson (4th generation, NX4—first year of the redesign) has flagged P0456—a very small EVAP leak. The 2.5L MPI or 1.6L turbo hybrid uses a standard EVAP system with threaded gas cap. Well within Hyundai's 5yr/60k warranty.
Clues
- Check engine light on
- P0456 stored
- No drivability issues
- AWD and hybrid (if equipped) normal
Causes
- Gas Cap Seal (High Likelihood): Loose or debris. $0 warranty.
- Purge Control Solenoid Valve (High Likelihood): Standard failure. $0 warranty.
- Canister Close Valve (Medium Likelihood): Vent control. $0 warranty.
- EVAP Hose Connection (Medium Likelihood): Loose connection. $0 warranty.
- FTP Sensor (Low Likelihood): Sensitivity. $0 warranty.
What to Do
- Reseat gas cap
- Schedule warranty appointment—Hyundai 5yr/60k through 2027
- Dealer handles everything for free
Cost
- Under warranty: $0
- 5yr/60k through 2027
- Federal emissions through 2030
Can I Drive?
Yes. P0456 has zero impact on performance, AWD, or any feature.
Warranty
Hyundai's 5yr/60k through 2027. 10yr/100k powertrain. Federal emissions 8yr/80k through 2030.