A P0304 diagnostic code on your 2024 Toyota Camry indicates the engine control module has detected repeated misfires in cylinder 4. The redesigned 9th generation Camry features exclusively hybrid powertrains.
2024 Camry Powertrain
The redesigned 2024 Camry is available only as a hybrid with the 2.5L Dynamic Force four-cylinder and electric motors producing 225 hp combined. Cylinder 4 is the rearmost on this inline-4.
Common Causes
- Ignition Coil Failure: Individual coil-on-plug units can fail
- Spark Plug Issues: Hybrid operation has specific requirements
- Fuel Injector Problems: Combined direct and port injection (D-4S)
- Hybrid System Integration: Engine/motor coordination
- Carbon Buildup: D-4S helps reduce but doesn't eliminate
Diagnostic Approach
Use Toyota Techstream or compatible scanner for hybrid diagnostics. Monitor misfire counts during hybrid operation cycles. Test ignition components systematically.
Repair Solutions
Replace failed ignition coils with Denso OEM components. Install Toyota-specified spark plugs. The D-4S dual injection system helps minimize carbon buildup. Dealer service ensures warranty coverage.