P0456 on Your 2024 Carnival: Quick Resolution
Your 2024 Carnival has triggered P0456—a very small EVAP leak. With the 3.5L V6, this is almost certainly a minor issue on a nearly new vehicle. Full Kia warranty coverage through 2029.
Clues
- Check engine light on
- P0456 stored
- No drivability issues
- Gas cap may not be clicked in fully
Suspects
- Gas Cap Not Seated (High Likelihood): Overwhelmingly common on new vehicles. $0.
- Purge Control Solenoid Valve (Medium Likelihood): Manufacturing variance. $0 warranty.
- Software Calibration (Low Likelihood): Detection threshold. $0 warranty update.
- EVAP Line Connection (Low Likelihood): Factory fitting. $0 warranty.
What to Do
- Reseat gas cap—click firmly
- If light persists after 2–3 drive cycles, dealer appointment
- Free warranty repair
Cost
- Under warranty: $0
- 5yr/60k through 2029
- Federal emissions through 2032
Can I Drive?
Yes. P0456 has zero impact on the V6, sliding doors, VIP seats, or any feature.
Warranty
Kia's 5yr/60k through 2029. 10yr/100k powertrain. Federal emissions 8yr/80k through 2032. No out-of-pocket cost.