When your 2024 Hyundai Sonata displays the P0304 code, the engine control module has detected recurring misfires in cylinder 4. Understanding the midsize sedan's engine options enables targeted diagnosis for effective repair of this combustion problem.
Understanding P0304 in the 2024 Sonata
The 2024 Sonata offers multiple powertrains including the 2.5L Smartstream four-cylinder, 1.6L turbocharged four-cylinder, and hybrid variants. All inline-four configurations position cylinder 4 at the rearmost location. Hyundai's advanced engine management identifies the specific misfiring cylinder through crankshaft velocity analysis.
Engine-Specific Considerations
The 2.5L Smartstream features continuously variable valve duration for optimal efficiency. The 1.6L turbo faces higher ignition demands from boosted pressures. Hybrid variants operate the combustion engine intermittently, adding diagnostic complexity. Direct injection across all variants contributes to carbon accumulation potential.
Diagnostic Approach
Identify your specific powertrain configuration. Retrieve all codes and freeze frame data. For hybrid models, verify proper hybrid system operation before focusing on cylinder 4. Test ignition coil output and spark plug condition. Verify fuel injector operation.
Repair Solutions
Install Hyundai-specified spark plugs for your engine type at correct torque specifications. Replace ignition coils testing outside acceptable ranges. Address fuel system concerns through cleaning or component replacement. Carbon cleaning benefits higher-mileage vehicles with direct injection.