The P0302 trouble code on your 2020 Hyundai Palisade indicates that cylinder 2 is experiencing misfires detected by the engine control module. The Palisade is powered exclusively by the 3.8L Lambda II GDI V6 engine producing 291 horsepower. This direct-injection V6 has specific characteristics affecting misfire diagnosis.
Lambda II V6 Engine Overview
The 3.8L Lambda II is a 60-degree V6 with dual overhead cams and gasoline direct injection. Cylinder 2 is located on the rear bank, positioned toward the firewall. The direct injection system operates at high pressure, delivering fuel directly into the combustion chambers. This design provides excellent power and efficiency but requires awareness of GDI maintenance needs.
Common Misfire Causes
Direct injection carbon buildup on intake valves is a documented concern on GDI engines including the Lambda II. Ignition coil failure affects spark delivery to cylinder 2. Spark plug wear reduces ignition effectiveness over time. Fuel injector clogging or electrical failure affects cylinder-specific fuel delivery.
Symptom Identification
V6 misfires produce noticeable symptoms. The large SUV exhibits rough idle, vibration through the cabin, and hesitation during acceleration. The smooth V6 character becomes disrupted. The check engine light illuminates when misfires are detected.
Diagnostic Process
Scan for all diagnostic codes and freeze frame data. Access cylinder 2 on the rear bank for spark plug and coil inspection. Borescope inspect intake valves for carbon accumulation. Test fuel injector operation and fuel pressure. Compression testing verifies cylinder mechanical integrity.
Repair Solutions
Replace spark plugs with OEM-specified iridium units. Replace faulty ignition coils. Address carbon buildup through walnut blasting or chemical cleaning methods. Service fuel injectors if testing indicates problems. The Lambda II responds well to proper GDI maintenance practices.