P0456 on Your 2023 Honda Pilot
A P0456 on your 2023 Pilot (all-new 4th generation) means a very small EVAP leak. The redesigned Pilot with the 3.5L V6 uses Honda's canister vent shut valve EVAP. Your 3yr/36k warranty runs through 2026. Gas cap first.
Symptoms
- Check engine light with P0456
- No drivability issues
- Gas cap may feel slightly off
- EVAP monitor incomplete
Top Causes
- Gas Cap Seal (Very High Likelihood): Tiny imperfection. $0–$20. May be warranty-covered.
- Canister Vent Shut Valve (Medium Likelihood): Honda EVAP valve. $0–$260 (warranty possible).
- Purge Solenoid (Low-Medium Likelihood): Slight leak. $0–$240 (warranty possible).
- EVAP Line Connection (Low Likelihood): Assembly gap. $0–$200 (warranty possible).
- Software Calibration (Low Likelihood): ECU sensitivity. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0456 persists, your Honda dealer will diagnose using HDS. Check warranty eligibility.
Warranty
Honda's 3yr/36k warranty runs through 2026. Federal emissions (8yr/80k) covers EVAP through 2031.
Safe to Drive?
Yes. P0456 has zero performance or safety impact.