The redesigned 2022 Infiniti QX60 delivers luxury three-row crossover capability with the proven 3.5L VQ V6 engine. When your QX60 displays a P0304 code indicating a cylinder 4 misfire, understanding this reliable powertrain helps guide accurate diagnosis.
Understanding P0304 in the QX60
The QX60's 3.5L VQ V6 is part of Nissan's legendary VQ engine family known for smooth power delivery and reliability. 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.
VQ Engine Considerations
The VQ V6 has an excellent reliability record across many Nissan and Infiniti applications. Port injection design means carbon buildup on intake valves is less of a concern than direct injection engines. Regular maintenance keeps ignition components in optimal condition.
Diagnostic Approach
Access the cylinder 4 ignition coil on the 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 Nissan/Infiniti specifications if worn. Test ignition coil output. The high quality of Nissan ignition components means thorough diagnosis should precede parts replacement.