The 2022 Kia K5 offers 4-cylinder engines—the 1.6L turbo or 2.5L turbo. Both are inline-4 configurations with only cylinders 1 through 4. When P0306: Cylinder 6 Misfire Detected displays, you're facing an anomalous code.
Second-Year K5
The K5 continues Kia's 4-cylinder-only approach for midsize sedans. No V6 is offered. P0306 indicates a cylinder that doesn't exist.
Sources of Erroneous P0306
Scanner confusion with older Optima models. Generic scanners misinterpret protocols. Aftermarket devices interfere. ECU glitches generate false codes.
Diagnostic Protocol
Clear all codes and drive normally. Use Kia GDS or professional equipment. Check for valid misfire codes (P0301-P0304).
Efficient Performance
The K5's turbocharged 4-cylinders provide V6-like performance. Use valid codes for concerns.