A P0302 code on your 2022 Mazda CX-30 indicates the engine control module has detected misfires in cylinder 2. The CX-30 offers the Skyactiv-G 2.5L naturally aspirated or Skyactiv-G 2.5T turbocharged four-cylinder. Each engine has specific diagnostic considerations for misfire resolution.
CX-30 Engine Options
The 2.5L produces 186 horsepower with Mazda's high-compression direct injection design. The turbo delivers up to 250 horsepower (227 on regular fuel). Both inline-4 engines position cylinder 2 second from the timing chain end.
Skyactiv Technology
Mazda's Skyactiv engines use high compression ratios and direct injection for efficiency. The naturally aspirated version has a 13:1 compression ratio, making it sensitive to ignition system condition. The turbo uses more conventional compression.
Common Misfire Causes
Direct injection carbon buildup can develop on intake valves. Ignition coil degradation affects spark delivery. Spark plug wear reduces ignition energy. The high-compression design is particularly sensitive to proper combustion. Turbo models add boost variables.
Symptom Recognition
The subcompact SUV displays rough idle, vibration, and hesitation with misfires. Four-cylinder engines show pronounced symptoms. Check engine light accompanies the condition.
Diagnostic and Repair Approach
Identify engine type. Scan for all codes. Inspect ignition components on cylinder 2. Test fuel system. Verify boost on turbo models. Given the newer model year, warranty coverage should apply.