If your 2024 Hyundai Sonata is displaying a P0305 code indicating a cylinder 5 misfire, this code requires diagnostic investigation. The 2024 Sonata offers only four-cylinder powertrains: the 2.5L naturally aspirated, 1.6L turbo (N Line), and 1.6L turbo hybrid. None have a cylinder 5, making P0305 technically anomalous.
2024 Sonata Powertrain
The eighth-generation Sonata offers the 2.5L Smartstream I-4 (191 hp), 2.5L Turbo I-4 (290 hp on N Line), and 1.6L Turbo Hybrid (192 hp combined). The V6 option was discontinued when this generation debuted in 2020. All configurations are four-cylinder.
Why P0305 Cannot Be Valid
All 2024 Sonata engines have exactly four cylinders numbered 1-4. A P0305 code references a non-existent cylinder 5, indicating a diagnostic error rather than an actual misfire.
Possible Causes
ECM software issues can store invalid codes. Scan tool communication errors may misread data. Low 12-volt battery voltage affects computer reliability. Aftermarket diagnostic tools may have compatibility issues with Hyundai systems.
Diagnostic Recommendations
Use a Hyundai GDS or compatible scan tool to verify codes. Test battery condition. If actual misfire symptoms exist, focus on cylinders 1-4. Clear the erroneous code and monitor.