A P0303 code in your 2020 Hyundai Santa Fe indicates the engine control module has detected excessive misfires at cylinder 3. This midsize SUV offers the 2.4L four-cylinder (185 horsepower) and the more powerful 2.0L turbocharged four-cylinder (235 horsepower). Understanding which engine powers your Santa Fe is essential for accurate diagnosis.
Cylinder 3 Location
Both Santa Fe engines are inline four-cylinders with cylinder 3 positioned third from the front of the engine. The transverse mounting places it toward the firewall, standard for Hyundai's front-wheel-drive-based SUVs.
Engine Options and Characteristics
The 2.4L Theta II engine provides adequate power for most driving needs. The 2.0L Theta II turbo adds forced induction for improved performance, operating under higher cylinder pressures that demand more from ignition components.
Common P0303 Causes at Four to Five Years
At this age, wear-related issues become more likely. Spark plug degradation affects ignition quality. Ignition coil failures occur from heat cycling. Carbon buildup (especially in direct-injected 2.0L turbo) restricts airflow. Fuel injector deposits affect spray patterns.
Turbo-Specific Considerations
The 2.0L turbocharged engine operates under elevated cylinder pressures. Boost leaks or wastegate issues disrupt air-fuel mixture calculations. Any weakness in the ignition system becomes apparent under boost.