A P0304 diagnostic code on your 2022 Honda Odyssey indicates the powertrain control module has detected repeated misfires in cylinder 4. The family minivan continues with the proven 3.5L V6.
2022 Odyssey Powertrain
The 2022 Odyssey uses the J35Y6 3.5L V6 producing 280 horsepower with Variable Cylinder Management. Cylinder 4 is on the rear bank of this transverse-mounted V6.
Typical Causes
- Ignition Coil Problems: Coil-on-plug failures
- Spark Plug Condition: Honda-specific requirements
- VCM Operation: Cylinder deactivation concerns
- Fuel Injector Issues: Direct injection deposits
- Carbon Accumulation: GDI valve deposits
Diagnostic Process
Use Honda diagnostic equipment for detailed access. Monitor VCM operation and misfire data. Test ignition components systematically.
Repair Recommendations
Replace faulty ignition coils with OEM parts. Install properly specified spark plugs. Address VCM issues through proper diagnosis. Dealer service for warranty coverage.