P0456 on Your 2022 Traverse: A Simple Case
Your 2022 Traverse (C1XX platform) has flagged P0456—a very small EVAP leak. The 3-row family SUV's 3.6L V6 uses GM's standard EVAP system. At 3–4 years old, check warranty status before any out-of-pocket spending.
Symptoms
- Check engine light on
- P0456 stored in ECM
- No drivability changes
- AWD and all features normal
Causes
- Gas Cap Seal (High Likelihood): Loose or worn. $0–$15 (warranty may cover).
- Vent Valve Solenoid (High Likelihood): GM's primary EVAP failure. $0–$220 (warranty may cover).
- Purge Solenoid (Medium Likelihood): V6 heat over time. $0–$200 (warranty may cover).
- EVAP Hose Connection (Medium Likelihood): Loose connection. $0–$250 (warranty may cover).
- FTP Sensor (Low Likelihood): Sensitivity drift. $120–$260.
Next Steps
- Reseat the gas cap
- Check warranty—GM 3yr/36k runs through 2025
- If covered, schedule dealer appointment
- If not, clear code and monitor through a drive cycle
Costs
- Under warranty: $0
- Gas cap: $10–$15
- Vent valve solenoid: $80–$220
- Purge solenoid: $80–$200
Can I Drive?
Yes. P0456 has zero impact on the Traverse's V6, AWD, third-row, or any feature.
Warranty
GM's 3yr/36k runs through 2025. Federal emissions (8yr/80k) covers EVAP through 2030. Check mileage for basic warranty eligibility.