The P0304 diagnostic trouble code on your 2023 Ford Mustang indicates the powertrain control module has detected consistent misfires in cylinder 4. The 2023 model continues with proven turbocharged and V8 options.
2023 Mustang Engine Options
The 2023 Mustang offers the 2.3L EcoBoost (310 hp) or 5.0L Coyote V8 (450-480 hp). Cylinder 4 location varies—rearmost on the inline-4, driver's side on the V8.
Typical Causes
- Ignition Coil Problems: Performance use stresses coils
- Spark Plug Condition: High-output engines demand quality
- Boost System Integrity: EcoBoost leaks
- Fuel Injector Issues: Direct injection deposits
- Carbon Accumulation: GDI valve deposits
Diagnostic Process
Use Ford diagnostics for detailed access. Identify your engine. Monitor boost on EcoBoost. Test ignition components systematically.
Repair Recommendations
Replace faulty ignition coils with Motorcraft or performance parts. Install properly specified spark plugs. Repair boost leaks.