The P0304 code in your 2022 Hyundai Santa Fe indicates the powertrain control module has detected persistent misfires in cylinder 4. Understanding the midsize SUV's available powertrains enables targeted diagnosis for effective repair of this combustion problem.
Understanding P0304 in the 2022 Santa Fe
The 2022 Santa Fe offers the 2.5L Smartstream four-cylinder as standard with a 2.5L turbocharged option. Hybrid and plug-in hybrid variants use a 1.6L turbocharged engine paired with electric motors. All four-cylinder configurations position cylinder 4 at the rear of the engine.
Smartstream Engine Considerations
The Smartstream 2.5L features continuously variable valve duration (CVVD) technology for optimal efficiency. The turbocharged variant experiences higher ignition demands from boosted pressures. Hybrid powertrains operate the combustion engine intermittently, affecting how symptoms present. Direct injection across variants contributes to carbon accumulation potential.
Diagnostic Process
Identify your specific powertrain configuration. Retrieve all codes including any hybrid system faults. Access cylinder 4 components for testing. Evaluate ignition coil output and spark plug condition. Verify fuel injector operation. For hybrids, ensure proper combustion engine operation modes.
Repair Solutions
Install Hyundai-approved spark plugs for your engine type. Replace ignition coils testing outside specifications. Address fuel system concerns. Hybrid-specific issues may require dealer expertise.