When your 2022 Nissan Maxima displays the P0304 code, the powertrain control module has identified recurring misfires in cylinder 4. Nissan's flagship sedan demands precise combustion for its performance-oriented character, making effective misfire diagnosis and repair essential for restoring expected driving dynamics.
Understanding P0304 in the 2022 Maxima
The 2022 Maxima features the proven 3.5L VQ-series V6 producing 300 horsepower. This transverse-mounted V6 positions cylinder 4 on the rear bank toward the firewall. Nissan's sophisticated engine management identifies the specific misfiring cylinder with precision, enabling targeted diagnosis of this combustion problem.
V6 Misfire Sources
The performance V6 operates under demanding conditions requiring quality ignition components. Spark plug electrodes erode from high-output operation. Ignition coils must generate consistent sparks under elevated combustion pressures. Direct fuel injection contributes to carbon accumulation on intake valves. Fuel injector precision affects both power delivery and combustion efficiency.
Systematic Diagnostics
Retrieve all codes and analyze freeze frame data. Access the rear cylinder bank where cylinder 4 resides—the crowded engine bay requires careful navigation. Test ignition coil output against performance specifications. Inspect spark plug condition and gap. Verify fuel injector operation meets precision requirements.
Effective Repairs
Install Nissan-approved spark plugs designed for the VQ V6's demands. Replace ignition coils testing outside specifications. Address fuel system concerns through cleaning or replacement. Professional carbon cleaning helps vehicles exhibiting intake valve deposit symptoms.