A P0304 diagnostic code on your 2024 Honda Accord indicates the engine control module has detected repeated misfires in cylinder 4. The 11th generation Accord offers turbocharged four-cylinder options.
2024 Accord Engine Options
The 2024 Accord offers the 1.5L turbocharged four-cylinder (192 hp) or 2.0L Atkinson-cycle with hybrid system (204 hp combined). On both inline-4 configurations, cylinder 4 is the rearmost cylinder.
Common Causes
- Ignition Coil Failure: Turbo applications stress ignition
- Spark Plug Issues: Turbocharged engines require specific plugs
- Boost System Leaks: 1.5L turbo sensitive to intake leaks
- Fuel Injector Problems: Direct injection deposits
- Carbon Buildup: GDI technology contributes to valve deposits
Diagnostic Approach
Use a Honda-compatible scanner for detailed diagnostics. Monitor misfire counts and boost data on the 1.5L turbo. The hybrid powertrain has different considerations. Test ignition components systematically.
Repair Solutions
Replace failed ignition coils with Honda OEM components. Install properly specified spark plugs. Address carbon buildup through professional cleaning. Repair boost system leaks. Dealer service ensures warranty coverage.