Diagnosing P0455 on Your 2023 Ford Bronco Sport
A P0455 on your 2023 Ford Bronco Sport means the PCM detected a large EVAP leak. Your compact SUV with the 1.5L or 2.0L EcoBoost is under Ford's warranty for this repair. Check the gas cap first—it's the most common cause—before scheduling a dealer visit.
Symptoms
- Check engine light with P0455
- Faint fuel odor near the filler or rear
- Gas cap not clicking securely
- EVAP readiness monitor not completing
Causes by Probability
- Gas Cap Seal (Very High Likelihood): Loose or defective. Tighten until it clicks. Warranty-covered if defective.
- Canister Vent Solenoid (Medium Likelihood): Ford's vent solenoid not sealing. Warranty-covered replacement.
- EVAP Purge Valve (Medium Likelihood): Stuck open or leaking. Warranty-covered.
- Vapor Line Connection (Low Likelihood): Loose fitting from the factory. Warranty-covered.
- Charcoal Canister (Low Likelihood): Rare defect on a newer vehicle. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If P0455 persists, visit a Ford dealer for IDS diagnostics and smoke testing—all free under warranty.
Warranty Coverage
Your 2023 Bronco Sport is covered by Ford's 3-year/36,000-mile warranty through 2026 and the federal emissions warranty (8 years/80,000 miles) through 2031. All EVAP repairs are free.
Safe to Drive?
Yes. P0455 doesn't affect the Bronco Sport's engine, AWD system, or any features.