Solving P0455 on Your 2023 Ford Bronco
A P0455 on your 2023 Ford Bronco indicates the PCM detected a large EVAP system leak. Your 6th-generation Bronco—whether equipped with the 2.3L EcoBoost or 2.7L twin-turbo V6—is under warranty for this repair. Check the gas cap first before scheduling a dealer visit.
Symptoms Present
- Check engine light with P0455
- Faint fuel odor near the filler neck or rear
- Gas cap not clicking properly
- Emissions monitor incomplete
Causes by Likelihood
- Gas Cap Seal (Very High Likelihood): Loose or defective cap. Tighten until it clicks. Warranty-covered if defective.
- Canister Vent Solenoid (Medium Likelihood): Ford's vent solenoid sticking open. Warranty-covered replacement.
- EVAP Vapor Line (Medium Likelihood): Disconnected or cracked line, especially on off-road-driven Broncos. Warranty-covered.
- Purge Valve (Low Likelihood): Stuck open or leaking. Warranty-covered.
- Charcoal Canister (Low Likelihood): Saturated from fuel overfilling or water intrusion during fording. Warranty-covered.
What to Do
Tighten the gas cap and drive 2–3 days. If the light stays on, take your Bronco to a Ford dealer. IDS diagnostics and smoke testing will locate the leak—all free under warranty.
Warranty Coverage
Your 2023 Bronco is covered by Ford's 3-year/36,000-mile bumper-to-bumper warranty through 2026, plus 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's engine, transmission, 4x4 system, or any trail capability.