Solving P0455 on Your 2023 Honda Ridgeline
A P0455 on your 2023 Honda Ridgeline signals a large EVAP system leak. Your refreshed 2nd-generation Ridgeline with the 3.5L V6 and 9-speed automatic is under warranty for this repair. Check the gas cap first—it's the most common and simplest cause.
Symptoms
- Check engine light with P0455
- Possible faint fuel odor
- Gas cap not clicking properly
- EVAP readiness monitor incomplete
Top Causes
- Gas Cap Seal (Very High Likelihood): Loose or defective cap seal. Tighten until it clicks. Warranty-covered if defective.
- Canister Vent Shut Valve (Medium Likelihood): Honda's vent valve not sealing. Warranty-covered replacement.
- EVAP Hose Connection (Medium Likelihood): Loose vapor line. Warranty-covered.
- Bypass Solenoid Valve (Low Likelihood): Honda EVAP component. Warranty-covered.
- Fuel Tank Seal (Low Likelihood): Manufacturing defect. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If the light stays on, take your Ridgeline to a Honda dealer. HDS diagnostics and smoke testing are free under warranty.
Warranty Coverage
Your 2023 Ridgeline is covered by Honda's 3-year/36,000-mile basic warranty (through 2026), 5-year/60,000-mile powertrain warranty, and federal emissions warranty (8 years/80,000 miles). All EVAP repairs are free.
Safe to Drive?
Yes. P0455 has no effect on the Ridgeline's 3.5L V6, AWD, towing, or truck bed features like the in-bed trunk.