Tracking Down P0455 on Your 2022 Honda Odyssey
A P0455 code on your 2022 Honda Odyssey means the EVAP system found a large leak—equivalent to a 0.040-inch or larger opening. Your 5th-generation Odyssey with the 3.5L V6 may still be within Honda's basic warranty. Before heading to the dealer, check the simplest cause first: your gas cap.
Evidence Present
- Check engine light with P0455
- Possible fuel odor near the rear of the vehicle
- Gas cap not clicking when tightened
- Emissions test failure
Suspects by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn seal. Tighten or replace ($10–$25). The most common P0455 cause on any Honda.
- Canister Vent Shut Valve (Medium Likelihood): Honda's vent valve sticking open. $150–$250 if out of warranty.
- EVAP Hose Leak (Medium Likelihood): Cracked or disconnected vapor line. $80–$200.
- Bypass Solenoid Valve (Low Likelihood): Honda EVAP component failure. $120–$220.
- Fuel Tank Seal (Low Likelihood): O-ring at the fuel sender. $100–$250.
What to Do
Tighten your gas cap until it clicks and drive for 2–3 days. If the light clears, the cap was loose. If it stays on, a Honda dealer will use HDS diagnostics and likely a smoke test to find the leak.
Warranty Status
Honda's basic warranty (3 years/36,000 miles) runs through 2025. The federal emissions warranty (8 years/80,000 miles) covers EVAP through 2030. Check with your dealer for free repair eligibility.
Safe to Drive?
Yes. P0455 is a vapor containment issue. Your Odyssey's 3.5L V6, 10-speed transmission, and all family features work normally.