The 2024 Mazda CX-30 delivers premium crossover refinement with the efficient Skyactiv-G engine technology. When a P0304 code appears indicating a cylinder 4 misfire, addressing it promptly maintains the smooth power delivery and fuel efficiency that make this compact crossover appealing.
Understanding P0304 in Your CX-30
Mazda's Skyactiv-G engine achieves its impressive efficiency through high compression ratio design. Cylinder 4 is located at the rear of the inline-4 engine, closest to the firewall. The powertrain control module uses sophisticated algorithms to monitor combustion quality through crankshaft position analysis, triggering P0304 when cylinder 4 misfires exceed acceptable thresholds.
2024 Model Considerations
The latest CX-30 incorporates refinements to the proven Skyactiv platform. On new vehicles, misfires are uncommon and may indicate component defects covered under warranty. The high-compression design requires ignition components in excellent condition—any manufacturing variance can manifest as misfires.
Diagnostic Approach
Access the cylinder 4 ignition coil at the engine's rear. Inspect the spark plug carefully—even on new engines, manufacturing defects occasionally occur. The coil-on-plug design allows targeted testing by swapping components between cylinders. Check for any intake system issues that could affect air delivery to cylinder 4.
Resolution Path
If within warranty, have your Mazda dealer diagnose and repair the issue. Component failures on new vehicles typically indicate manufacturing defects covered under warranty. If diagnosing independently, verify ignition coil output and spark plug condition. Software updates addressing engine calibration may be available.