P0440 on Your 2022 Ford Maverick: The Investigation Begins
The 2022 Ford Maverick — the innovative compact truck that brought affordable hauling to the masses — has triggered a P0440 code. This points to the Evaporative Emission Control (EVAP) system. The Maverick is available with a 2.5L hybrid powertrain or a 2.0L EcoBoost, and both use EVAP systems that can develop issues. Let's dig into the details.
Symptoms to Watch For
- Check engine light illuminated
- Faint fuel smell near the truck
- Slightly worse fuel economy
- Difficulty at the gas pump with the nozzle clicking off
- Emissions test failure
The Maverick's performance will not be affected by P0440. Hybrid models will continue to operate in all drive modes normally. The check engine light is typically the only indication.
Top Causes Ranked
- Capless Fuel Filler Seal — Like all modern Fords, the Maverick uses the Easy Fuel capless system. Contamination or seal wear is the number one P0440 trigger. Estimated repair: $10–$80.
- Purge Valve Solenoid — The purge solenoid on both the hybrid and EcoBoost powertrains can fail. On the hybrid, this can also affect the transition between electric and gas modes. Estimated repair: $75–$185.
- Vent Valve Solenoid — The canister vent valve is mounted near the rear of the truck and controls airflow into the EVAP system. Estimated repair: $90–$220.
- EVAP Hose Leak — The Maverick's unibody construction generally protects vapor lines well, but connections can loosen over time. Estimated repair: $40–$140.
- Charcoal Canister Issues — Overfilling the fuel tank is a common cause of canister saturation on the Maverick due to its smaller tank design. Estimated repair: $180–$420.
Diagnostic Approach
- Scan for companion EVAP codes (P0441, P0442, P0446, P0455, P0456)
- Clean and inspect the capless fuel filler
- Use FORScan or a compatible tool to test purge and vent valve operation
- Perform an EVAP smoke test
- Check for TSBs — the 2022 Maverick has had some early-production bulletins
Repair Cost Breakdown
- Capless filler cleaning/repair: $10–$80
- Purge valve replacement: $75–$185
- Vent valve replacement: $90–$220
- EVAP hose repair: $40–$140
- Charcoal canister replacement: $180–$420
- Diagnostic fee: $80–$150
Safe to Drive?
Yes. P0440 is a low-severity emissions code. Both the hybrid and EcoBoost Mavericks will drive normally. Hybrid electric operation is unaffected.
DIY or Shop?
Capless filler cleaning is a quick DIY task. Purge valve replacement varies by engine — the 2.0L EcoBoost valve is accessible in the engine bay, while the hybrid powertrain may require more disassembly. A smoke test for leak detection is best done by a professional.