The 2022 Buick Enclave delivers premium three-row SUV comfort with the proven 3.6L V6 engine. When your Enclave displays a P0304 code indicating a cylinder 4 misfire, understanding this reliable powertrain helps guide accurate diagnosis.
Understanding P0304 in the Enclave
The Enclave's 3.6L V6 is GM's High Feature engine known for smooth, refined power delivery. Cylinder 4 is located on the rear of the left bank of the V6. The engine control module monitors combustion events through crankshaft position analysis.
V6 Engine Considerations
The 3.6L V6 has a proven reliability record across many GM applications. Direct injection technology, while providing excellent efficiency, can contribute to carbon buildup on intake valves over extended mileage. Regular maintenance helps prevent ignition-related issues.
Diagnostic Approach
Access the cylinder 4 ignition coil on the rear left bank. Inspect spark plug electrode condition. Check for vacuum leaks in the intake manifold. Verify fuel injector operation if ignition components check out.
Resolution Process
Replace spark plugs with AC Delco specifications if worn. Test ignition coil output. If carbon buildup is suspected on higher-mileage vehicles, intake valve cleaning may be warranted.