The P0302 trouble code on your 2020 Hyundai Kona indicates that cylinder 2 is experiencing misfires detected by the engine control module. The first-generation Kona offers two gasoline engine options: the 2.0L Nu four-cylinder producing 147 horsepower or the 1.6L turbocharged four-cylinder producing 175 horsepower. Each engine requires different diagnostic approaches.
Engine Options and Configuration
Both Kona engines are inline-4 designs with cylinder 2 second from the timing chain end. The 2.0L uses multi-port fuel injection while the 1.6L turbo features direct injection. The 1.6L turbo offers significantly more power but has additional complexity from boost system and GDI components.
2.0L Nu Misfire Causes
The naturally aspirated 2.0L experiences standard gasoline engine issues: ignition coil failure, spark plug wear, fuel injector clogging, and vacuum leaks. Port injection means carbon buildup is minimal. This straightforward engine responds well to conventional diagnostic techniques.
1.6L Turbo Considerations
The turbocharged 1.6L adds complexity. Direct injection can lead to carbon buildup on intake valves. Boost pressure irregularities from wastegate or blow-off valve issues cause misfires. Higher cylinder stress can accelerate ignition component wear. The smaller turbocharged engine demands consistent maintenance.
Symptom Recognition
The compact Kona displays pronounced four-cylinder misfire symptoms. Rough idle, vibration, and hesitation significantly affect the driving experience. Check engine light illumination accompanies the misfire condition.
Diagnostic and Repair Approach
Identify your engine type before diagnosis. Scan for all codes including boost-related codes on turbo models. Inspect ignition components. Test fuel system appropriate to injection type. Turbo models require boost system evaluation. Standard maintenance typically resolves misfire conditions.