When your 2023 Nissan Murano displays the P0304 code, the powertrain control module has identified recurring misfires in cylinder 4. As the final model year for the current Murano generation, this premium crossover's proven 3.5L V6 benefits from well-established diagnostic procedures for effective repair.
Understanding P0304 in the 2023 Murano
The 2023 Murano continues with the refined 3.5L VQ-series V6 producing 260 horsepower. This transverse-mounted V6 positions cylinder 4 on the rear bank toward the firewall. Nissan's sophisticated engine management precisely identifies the misfiring cylinder through crankshaft velocity analysis.
V6 Misfire Sources
The naturally aspirated V6 experiences standard ignition component wear. Spark plug electrodes erode over normal operation. Ignition coils degrade through repeated thermal cycling. Direct injection contributes to carbon accumulation on intake valves. Fuel injector performance affects the smooth power delivery characteristic of this premium vehicle.
Systematic Diagnostics
Retrieve all codes and analyze freeze frame data. Access the rear bank for cylinder 4 component inspection. Test spark plug condition and ignition coil output. Verify fuel injector operation through appropriate testing methods. Consider the vehicle's maintenance history and mileage context.
Repair Implementation
Install Nissan-approved spark plugs for the 3.5L V6 at correct torque specifications. Replace ignition coils testing outside acceptable ranges. Address fuel system issues through cleaning or replacement. Carbon cleaning benefits vehicles with higher mileage showing related symptoms.