Investigating P0446 on Your 2022 Lincoln Aviator
A P0446 code on your 2022 Lincoln Aviator indicates an EVAP vent control circuit malfunction. The Aviator uses the 3.0L twin-turbocharged V6 on the CD6 platform (the Grand Touring adds a plug-in hybrid system). 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) provides coverage through 2028.
Clues and Symptoms
- Check engine light with P0446
- Fuel fill difficulty
- EVAP readiness monitor incomplete
- Grand Touring PHEV: monitors may run less frequently
Top Suspects
- Canister Vent Solenoid Failure (High Likelihood): The vent solenoid fails electrically or mechanically. Replacement costs $140–$270 if not warranty-covered.
- Purge Valve Malfunction (High Likelihood): Sticking purge valve disrupts EVAP flow. Replacement runs $130–$240.
- Vent Solenoid Wiring or Connector (Medium Likelihood): Connector corrosion or damage. Repair costs $80–$190.
- EVAP Hose Deterioration (Medium Likelihood): Hose cracks or loose connections. Repair runs $60–$150.
- Gas Cap Seal (Low Likelihood): Worn seal. Replacement is $15–$35.
How to Investigate
Under warranty, go to a Lincoln dealer for FDRS diagnostics. FORScan (~$60) provides enhanced Ford/Lincoln diagnostics for DIY. Check the gas cap first, then inspect the vent solenoid connector.
Warranty and Cost
Lincoln's basic warranty (4yr/50k) may still apply. The powertrain warranty (6yr/70k) covers through 2028. Out of warranty: $130–$270.
Safe to Drive?
Yes. P0446 doesn't affect your Aviator's twin-turbo performance, AWD, air suspension, or PHEV operation (if Grand Touring).