When your 2022 Lincoln Navigator triggers the P0303 code, the powertrain control module has detected consistent misfires in cylinder 3. The full-size luxury SUV uses Ford's powerful twin-turbo EcoBoost V6.
3.5L EcoBoost V6 Layout
The 2022 Navigator uses the 3.5L twin-turbocharged V6 producing 440 horsepower. Cylinder 3 is located on one bank of this V6. The twin-turbo system requires specific diagnostic approaches.
Common Causes
- Ignition Coil Failure: Twin-turbo boost stresses ignition systems
- Spark Plug Issues: EcoBoost engines require specific plugs
- Boost System Leaks: Twin-turbo system sensitive to leaks
- Fuel Injector Problems: Direct injection deposits
- Carbon Buildup: GDI technology leads to valve deposits
Diagnostic Approach
Use Ford IDS or FORScan for detailed EcoBoost diagnostics. Monitor boost pressure and misfire counts. Test ignition components systematically. Check for TSBs addressing known issues.
Repair Solutions
Replace failed ignition coils with Motorcraft or quality aftermarket parts. Install Ford-specified spark plugs. Repair boost system leaks. Address carbon buildup through professional cleaning.