A P0303 code in your 2024 Hyundai Tucson indicates the engine control module has detected persistent misfires at cylinder 3. The current Tucson offers the 2.5L Smartstream four-cylinder (187 horsepower), 1.6L turbocharged four-cylinder hybrid (226 combined horsepower), and 1.6L turbo plug-in hybrid (261 combined horsepower). Understanding your powertrain configuration is essential for diagnosis.
Cylinder 3 Configuration
All Tucson gasoline engines are inline four-cylinders with cylinder 3 positioned third from the front. The transverse mounting places cylinder 3 toward the firewall in this compact SUV platform.
Multiple Powertrain Options
The standard 2.5L is naturally aspirated, offering reliable performance without turbo complexity. The hybrid and PHEV variants use the 1.6L turbocharged engine paired with electric motors. Turbocharged engines operate under higher cylinder pressures, demanding more from ignition components.
New Vehicle Misfire Scenarios
Even brand-new vehicles experience P0303 codes from manufacturing defects, fuel quality issues, software calibration sensitivity, or assembly errors. Hyundai's warranty covers these concerns.
Hybrid System Considerations
In hybrid and PHEV variants, the gasoline engine works in conjunction with electric motors. The engine may cycle on and off during driving, creating different operating patterns than traditional vehicles. Misfires may be more apparent during engine-only operation.