When your 2022 Kia Sorento displays the P0304 code, the powertrain control module has identified recurring misfires in cylinder 4. The fourth-generation Sorento offers multiple powertrains, and understanding your specific configuration enables targeted diagnosis for this three-row SUV's combustion problem.
Understanding P0304 in the 2022 Sorento
The 2022 Sorento features several engine options: the 2.5L Smartstream four-cylinder, 2.5L turbocharged engine, and hybrid variants using a 1.6L turbo with electric motor. All four-cylinder configurations position cylinder 4 at the rear of the inline arrangement. Kia's engine management precisely identifies the misfiring cylinder.
Powertrain-Specific Misfire Causes
The 2.5L Smartstream faces standard ignition wear including spark plug and coil degradation. The turbocharged variant experiences higher demands from boosted pressures. Hybrid powertrains cycle the combustion engine intermittently. All variants use direct injection with carbon accumulation potential on intake valves.
Systematic Diagnostics
Identify your powertrain configuration. Retrieve all codes including hybrid system faults if applicable. Access cylinder 4 and test ignition coil output and spark plug condition. Verify fuel injector operation. For hybrids, ensure proper combustion engine operation before focusing on cylinder 4.
Effective Repairs
Install Kia-approved spark plugs for your engine type. Replace ignition coils showing degraded output. Address fuel system concerns. Hybrid-specific issues may require dealer expertise.