A P0306 diagnostic trouble code on your 2022 Buick Enclave indicates a misfire detected on cylinder 6. The Enclave's 3.6L V6 engine (LGX) produces 310 horsepower and has six cylinders, making this code completely valid for your vehicle.
Understanding the Enclave's V6
The 2022 Buick Enclave uses GM's proven 3.6L V6 (LGX) with variable valve timing and direct injection. This engine is transversely mounted, with cylinder 6 located at the rear of the front (firewall) bank. The direct injection system provides excellent performance but can contribute to carbon buildup over time.
Common Causes of P0306
- Ignition Coil Failure: Individual coil-on-plug degradation
- Spark Plug Wear: Worn electrodes or incorrect gap
- Fuel Injector Issues: Direct injector failure or clogging
- Carbon Buildup: Intake valve deposits affecting sealing
- Vacuum Leaks: Intake manifold or gasket leaks
- Low Compression: Valve train or piston wear