The 2022 Mazda CX-5 delivers an engaging driving experience through its efficient Skyactiv-G engine technology. When a P0304 code appears indicating a cylinder 4 misfire, prompt attention ensures your CX-5 maintains its responsive character and excellent fuel economy.
Understanding P0304 in Your CX-5
Mazda's Skyactiv-G 2.5L engine uses a high 13:1 compression ratio to maximize efficiency—significantly higher than most competitors. Cylinder 4 is positioned at the rear of the inline-4 engine. The powertrain control module monitors combustion events through the crankshaft position sensor to detect misfires with precision.
High Compression Considerations
The elevated compression ratio that gives the Skyactiv engine its efficiency also demands premium ignition system performance. Spark plugs operate under more stress than in conventional engines, and any degradation affects combustion quality. The high compression also amplifies the effects of carbon deposits or valve sealing issues.
Diagnostic Approach
Begin by accessing the cylinder 4 ignition coil at the engine's rear. The coil-on-plug design allows individual testing. Remove the spark plug and inspect it carefully—worn electrodes or incorrect gap cause problems in high-compression engines. Check for vacuum leaks in the intake manifold that could cause lean misfires.
Repair Strategy
Replace spark plugs with OEM-specification components. Standard aftermarket plugs may not meet the demands of Skyactiv's high-compression design. Verify ignition coil output is within specification. If the issue persists, fuel injector cleaning or replacement may be necessary.