The 2022 Mazda CX-50 launched as a rugged new addition to Mazda's crossover lineup, powered by the efficient Skyactiv-G 2.5L engine. When your CX-50 displays a P0304 code indicating a cylinder 4 misfire, prompt diagnosis ensures this adventure-ready crossover maintains its responsive performance.
Understanding P0304 in the CX-50
Mazda's Skyactiv-G 2.5L engine features a high 13:1 compression ratio that delivers excellent efficiency through optimized combustion. Cylinder 4 is located at the rear of the inline-4 engine, nearest the firewall. The powertrain control module monitors crankshaft acceleration patterns to detect misfires with precision.
First-Year Model Considerations
As a 2022 first-model-year vehicle, some early production CX-50s may have benefited from technical service bulletins addressing various concerns. Verify with your dealer that all applicable updates have been applied. The high-compression Skyactiv design demands ignition components in peak condition.
Diagnostic Approach
Access the cylinder 4 ignition coil at the engine's rear. The individual coil-on-plug design allows targeted testing. Inspect the spark plug for proper electrode condition and gap—high-compression engines are sensitive to spark plug degradation. Check for vacuum leaks in the intake system that could cause lean conditions.
Resolution Process
Replace spark plugs with Mazda-specified components designed for high-compression operation. Verify ignition coil output meets specifications. If within warranty, have your dealer diagnose and repair the issue as component failures should be covered. Apply any available software updates for engine management.