Investigating P0446 on Your 2022 Lincoln Nautilus
A P0446 code on your 2022 Lincoln Nautilus indicates an EVAP vent control circuit malfunction. The 2022 Nautilus uses the CD4 platform with the 2.0L turbocharged four-cylinder or 2.7L twin-turbo V6. The EVAP system features a canister vent solenoid controlled by the PCM.
The Lincoln basic warranty (4yr/50k) may still be active. The powertrain warranty (6yr/70k) extends through 2028.
Clues and Symptoms
- Check engine light with P0446
- Fuel fill difficulty
- EVAP readiness monitor incomplete
Top Suspects
- Canister Vent Solenoid Failure (High Likelihood): The vent solenoid fails electrically or mechanically. Replacement costs $130–$250.
- Purge Valve Malfunction (High Likelihood): EcoBoost purge valve failures are a known pattern on Ford/Lincoln turbocharged engines. Replacement runs $120–$230.
- Vent Solenoid Wiring or Connector (Medium Likelihood): Connector corrosion or damage. Repair costs $80–$180.
- EVAP Hose Deterioration (Medium Likelihood): Hose cracks or connections. Repair runs $60–$150.
- Gas Cap Seal (Low Likelihood): Worn seal. Replacement is $15–$30.
How to Investigate
Under warranty, go to a Lincoln dealer for FDRS diagnostics. FORScan provides enhanced Ford/Lincoln diagnostics for DIY. Check the gas cap first. Note that EcoBoost purge valve issues are a documented concern on turbo Ford/Lincoln models.
Warranty and Cost
Lincoln's basic warranty (4yr/50k) may still apply. The powertrain warranty (6yr/70k) covers through 2028. Out of warranty: $120–$250.
Safe to Drive?
Yes. P0446 doesn't affect your Nautilus's engine, AWD, transmission, or any luxury features.