Examining P0455 on Your 2022 Lincoln Navigator
A P0455 on your 2022 Navigator (4th generation) indicates a large EVAP leak. The 3.5L twin-turbo EcoBoost V6 on Ford's T3 platform uses Ford's EVAP system with a canister vent solenoid. Lincoln's 4-year/50,000-mile warranty runs through 2026.
Evidence
- Check engine light illuminated
- P0455 stored in PCM
- Possible fuel odor
- Gas cap not clicking
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or worn. $0–$25.
- Canister Vent Solenoid (Medium Likelihood): Ford EVAP vent valve. $130–$280 installed.
- Purge Valve (Medium Likelihood): Sticking. $110–$250 installed.
- EVAP Canister (Low-Medium Likelihood): Charcoal saturation. $220–$420 installed.
- Fuel Tank Deformation Valve (Low Likelihood): Ford-specific. $140–$300 installed.
Diagnosis
Gas cap first. Drive 2–3 days. If P0455 returns, your Lincoln dealer with IDS/FORScan or a smoke test will locate the leak.
Warranty
Lincoln's 4yr/50k warranty runs through 2026. Federal emissions (8yr/80k) covers EVAP through 2030.
Safe to Drive?
Yes. P0455 doesn't affect the twin-turbo V6, 4WD, towing, or any Navigator features.