The P0304 code in your 2024 Nissan Altima indicates the engine control module has detected persistent misfires in cylinder 4. With two four-cylinder engine options available, understanding your specific powertrain helps target diagnosis for effective repair of this combustion problem.
Understanding P0304 in the 2024 Altima
The 2024 Altima offers the 2.5L naturally aspirated four-cylinder or the innovative 2.0L VC-Turbo with variable compression technology. Both inline-four configurations place cylinder 4 at the rearmost position. The VC-Turbo's advanced technology adds unique diagnostic considerations beyond traditional engine troubleshooting.
Engine-Specific Misfire Causes
The 2.5L engine faces standard ignition and fuel system wear patterns. The VC-Turbo adds turbocharging and variable compression complexity—higher cylinder pressures demand robust ignition components, and the variable compression system must function properly for consistent combustion. Both engines use direct injection with associated carbon accumulation concerns.
Diagnostic Approach
Identify your engine type before diagnosis. Retrieve all codes including any VC-Turbo-specific faults. Access cylinder 4 and test ignition coil output and spark plug condition. Verify fuel injector operation. For VC-Turbo models, ensure variable compression actuators function correctly and no related codes exist.
Repair Solutions
Install Nissan-specified spark plugs appropriate for your engine. Replace degraded ignition coils. Address fuel injector concerns. The VC-Turbo may require specialized diagnosis if variable compression system issues contribute to misfires.