Tracking P0455 on Your 2022 Nissan Titan
A P0455 on your 2022 Titan means the ECM found a large EVAP leak. Your A61-generation Titan with the 5.6L Endurance V8 and 9-speed automatic may still be within Nissan's basic warranty. The gas cap is the top suspect.
Evidence
- Check engine light with P0455
- Faint fuel odor near the bed or filler
- Gas cap not clicking
- Emissions monitor incomplete
Causes Ranked
- Gas Cap Seal (Very High Likelihood): Loose or worn. Tighten or replace ($10–$25).
- Vent Control Valve (Medium Likelihood): Nissan's vent valve. $120–$250 if out of warranty.
- Purge Volume Control Valve (Medium Likelihood): PVCV stuck open. $100–$220.
- Vapor Line (Low Likelihood): Cracked hose under the truck. $80–$200.
- Charcoal Canister (Low Likelihood): Saturated. $200–$400.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, check warranty status and visit a Nissan dealer. The Titan's large fuel system benefits from professional smoke testing.
Warranty Coverage
Nissan's basic warranty (3yr/36k) runs through 2025. Nissan offers a 5-year/100,000-mile powertrain warranty on the Titan. The federal emissions warranty (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the Titan's 5.6L V8, 9-speed, 4x4, or towing capacity.