A P0304 diagnostic code on your 2016 Ford F-150 indicates the powertrain control module has detected repeated misfires in cylinder 4. The aluminum-body 13th generation F-150 offers multiple engine choices.
2016 F-150 Engine Options
The 2016 F-150 offers the 3.5L V6, 2.7L EcoBoost V6, 3.5L EcoBoost V6, and 5.0L V8. At this age, component wear is expected. Cylinder 4 location varies by engine.
Typical Causes
- Ignition Coil Failure: Age-related degradation
- Spark Plug Wear: Likely past service interval
- Fuel Injector Issues: Years of deposit buildup
- Carbon Buildup: Common on EcoBoost at this age
- Vacuum Leaks: Deteriorated components
Diagnostic Process
Use Ford diagnostics for detailed access. Systematic testing is essential at this age. Monitor misfire counts. Test ignition components.
Repair Recommendations
Replace ignition coils and spark plugs. Carbon cleaning highly recommended for EcoBoost. Clean fuel injectors. Repair vacuum leaks.