Following the Clues: P0440 on Your 2023 Ford Bronco Sport
When your 2023 Ford Bronco Sport displays a P0440 code, the trail leads to the Evaporative Emission Control (EVAP) system. The 2023 model year brought minor refinements to this compact SUV, but the EVAP system design remains consistent with the first-generation platform. Whether you drive a base or Badlands trim, here's what you need to know.
Symptoms Worth Noting
- Check engine light on
- Subtle gasoline odor near the vehicle
- Slight reduction in MPG
- Fuel nozzle clicking off repeatedly at the pump
- Emissions test failure
Your Bronco Sport will drive and perform normally with P0440. The code affects the emissions system only and does not impact engine power or drivability.
Deductions: Ranked Causes
- Capless Filler System Contamination — The most frequent cause across all Ford models with Easy Fuel. Dust, dirt, and trail debris can prevent the internal flap from sealing. Estimated repair: $15–$85.
- Canister Purge Valve Failure — Available on both the 1.5L and 2.0L EcoBoost engines, the purge valve controls vapor flow to the intake. A stuck valve is a common failure. Estimated repair: $80–$190.
- Canister Vent Valve Issue — The vent solenoid can become clogged with dirt or fail electrically, especially on vehicles driven in dusty conditions. Estimated repair: $90–$235.
- Vapor Line Damage — Physical damage to EVAP hoses from off-road obstacles is possible on the Bronco Sport. Estimated repair: $50–$150.
- Fuel Tank Pressure Sensor — An inaccurate FTP sensor can trigger P0440 without any actual leak. Estimated repair: $120–$270.
How to Diagnose
- Read all diagnostic codes and freeze frame data
- Check the capless fuel filler for debris or seal damage
- Command the purge and vent valves with a scan tool
- Smoke test the EVAP system for leaks
- Monitor fuel tank pressure sensor readings for anomalies
Cost to Repair
- Capless filler service: $15–$85
- Purge valve: $80–$190
- Vent valve: $90–$235
- Vapor line repair: $50–$150
- FTP sensor: $120–$270
- Diagnostic fee: $80–$150
Warranty note: Your 2023 Bronco Sport should still be covered under Ford's bumper-to-bumper warranty. Take advantage of free dealer repairs before it expires.
Should I Worry?
No. P0440 is a low-severity emissions code. Drive normally but schedule a repair soon, especially to take advantage of remaining warranty coverage.
DIY or Dealer?
Given likely warranty coverage on a 2023 model, the dealer is your best first stop. If you're out of warranty, capless filler cleaning and purge valve replacement are reasonable DIY jobs.