P0456 on the All-New 2024 Traverse
Your 2024 Traverse—a complete redesign with the new 2.5L turbo four-cylinder replacing the 3.6L V6—has triggered P0456, a very small EVAP leak. On a vehicle this new, warranty handles everything at zero cost.
Symptoms
- Check engine light on
- P0456 stored
- No performance issues
- AWD and all features normal
Likely Causes
- Gas Cap Seal (High Likelihood): Loose cap or debris. $0 warranty.
- Vent Valve Solenoid (High Likelihood): Manufacturing variance on new platform. $0 warranty.
- Purge Solenoid (Medium Likelihood): New 2.5L turbo component. $0 warranty.
- EVAP Connection (Medium Likelihood): Factory assembly. $0 warranty.
- Software Calibration (Low Likelihood): First-year platform ECM update. $0 warranty.
What to Do
- Reseat the gas cap
- Schedule warranty appointment
- Dealer diagnoses and repairs for free
Cost
- Under warranty: $0
- Bumper-to-bumper through 2027
- Federal emissions through 2032
Can I Drive?
Yes. P0456 has zero impact on the Traverse's 2.5L turbo, AWD, third-row, or any feature.
Warranty
Full 3yr/36k through 2027. Federal emissions 8yr/80k through 2032. Do not DIY on a new vehicle—let the dealer handle it.