The P0304 diagnostic trouble code on your 2023 Honda Pilot indicates the powertrain control module has detected consistent misfires in cylinder 4. The completely redesigned 4th generation Pilot continues with the proven 3.5L V6.
2023 Pilot Powertrain
The redesigned 2023 Pilot uses the J35Y7 3.5L V6 producing 285 horsepower. Cylinder 4 is on the rear bank of this V6. The new platform features updated engine management systems.
Typical Causes
- Ignition Coil Problems: Individual coil failures possible
- Spark Plug Condition: Must meet Honda specifications
- Fuel Injector Issues: Direct injection concerns
- Carbon Deposits: GDI valve accumulation
- Software Calibration: First-year redesign may have updates
Diagnostic Process
Use Honda diagnostic equipment for the new platform. Monitor misfire counts. Check for TSBs addressing first-year issues. Test ignition components systematically.
Repair Recommendations
Replace faulty ignition coils with OEM parts. Install properly specified spark plugs. Check for ECM software updates. Dealer service ensures warranty coverage.