The P0302 diagnostic code on your 2022 Subaru WRX indicates cylinder 2 is experiencing misfires detected by the engine control module. The fifth-generation WRX introduced for 2022 features the 2.4L FA24F turbocharged boxer four-cylinder producing 271 horsepower. This performance-oriented turbo engine has specific diagnostic considerations.
FA24F in WRX Application
The 2022 WRX's 2.4L turbo replaces the previous EJ257 engine with modern design. Cylinder 2 is on the passenger bank of the horizontally opposed four-cylinder. The direct-injection turbocharged system delivers responsive performance. Higher tune levels compared to other FA24F applications increase component stress.
Performance Engine Misfire Causes
Direct injection carbon buildup develops on intake valves. Boost pressure issues from wastegate or blow-off valve problems affect combustion. Ignition coil failure is common in high-performance turbo applications. Spark plug wear accelerates under spirited driving. Fuel injector problems affect cylinder-specific delivery.
Symptom Recognition
The boxer turbo's distinctive rumble changes noticeably with misfires. The sports sedan displays rough idle, unusual vibration, and hesitation during boost buildup. Performance driving character suffers significantly. Check engine light accompanies the condition.
Diagnostic Process
Scan for all codes including boost-related codes. Access cylinder 2 on the passenger bank. Test ignition components—critical in performance applications. Verify boost pressure and system integrity. Borescope inspect intake valves. Test fuel system. Compression testing verifies mechanical health.
Performance Considerations
Use quality OEM or performance-grade replacement parts. The WRX's higher tune level demands robust ignition components. Premium fuel is required. Regular maintenance intervals should be followed closely for performance driving.