A P0302 code on your 2022 Subaru Crosstrek indicates the engine control module has detected misfires in cylinder 2. The 2022 Crosstrek offers the 2.0L FB20D or 2.5L FB25D boxer four-cylinder engines. Understanding Subaru's horizontally opposed engine design is essential for effective diagnosis.
FB Engine Family
Both Crosstrek engines are flat-four designs with cylinder 2 on the passenger bank. The 2.0L produces 152 horsepower while the 2.5L produces 182 horsepower. Direct injection is standard, providing efficient fuel delivery but requiring awareness of GDI maintenance needs.
Common Misfire Causes
Direct injection carbon buildup develops on intake valves over time. Ignition coil degradation affects spark delivery. Spark plug fouling can occur with the horizontal cylinder position affecting oil drainage. Fuel injector problems affect cylinder-specific delivery.
Symptom Identification
The compact Crosstrek displays pronounced misfire symptoms. The distinctive boxer sound changes noticeably. Rough idle, vibration, and hesitation affect driving. Check engine light accompanies detected misfires.
Diagnostic Process
Identify your engine type. Scan for all codes and freeze frame data. Access cylinder 2 on the passenger bank for inspection. Test ignition components. Borescope inspect intake valves. Test fuel injector operation. Compression testing verifies health.
Repair Approach
Replace ignition components as needed. Address carbon buildup through appropriate methods. Service fuel injectors if indicated. Given the newer model year, warranty coverage should apply to defect-related issues.