The P0302 trouble code on your 2020 Hyundai Elantra indicates that cylinder 2 is experiencing misfires detected by the engine control module. The sixth-generation Elantra offers multiple engine choices: the standard 2.0L Nu four-cylinder, the 1.6L turbocharged four-cylinder in Sport and N-Line trims, and the high-performance 2.0L turbo in the Elantra N. Each engine requires different diagnostic considerations.
Engine Options and Cylinder 2
All Elantra engines are inline-4 configurations with cylinder 2 positioned second from the timing chain end. The 2.0L Nu uses multi-port injection while the 1.6L turbo features direct injection. The 2.0L turbo N engine combines direct and port injection for optimal performance and reduced carbon buildup.
2.0L Nu Misfire Causes
The naturally aspirated 2.0L commonly experiences misfires from ignition coil failure, spark plug wear, fuel injector clogging, and vacuum leaks. This straightforward engine responds well to standard diagnostic techniques.
1.6L Turbo Considerations
The turbocharged 1.6L adds boost system variables to diagnosis. Wastegate issues, boost leaks, and direct injection carbon buildup can cause misfires. The higher stress per cylinder in turbocharged applications can accelerate component wear.
Symptom Recognition
Four-cylinder engines display obvious misfire symptoms: rough idle, hesitation, and noticeable vibration. The compact Elantra's driving experience is significantly affected when cylinder 2 misfires. Check engine light illumination accompanies the condition.
Diagnostic and Repair Strategy
Identify which engine your Elantra has before beginning diagnosis. Scan for all codes including boost-related codes on turbo models. Inspect ignition components, test fuel system, and check for boost leaks on turbo engines. Standard ignition maintenance resolves most misfire conditions.