The P0302 diagnostic code on your 2024 Subaru Impreza indicates cylinder 2 is experiencing misfires detected by the engine control module. The sixth-generation Impreza introduced for 2024 features the larger 2.5L FB25D boxer four-cylinder producing 182 horsepower—an upgrade from the previous 2.0L. This horizontally opposed engine has specific diagnostic considerations.
New Generation Engine
The 2024 Impreza's 2.5L boxer replaces the previous 2.0L for improved performance. Cylinder 2 is on the passenger (right) bank. Direct injection provides efficient fuel delivery. The flat-four layout maintains Subaru's signature balanced operation and low center of gravity.
Potential Misfire Causes
As a new model year, component defects can cause misfires. Manufacturing variations in ignition coils, spark plugs, or fuel injectors may occur. The direct injection system requires proper calibration. Assembly irregularities, while uncommon, are possible.
Symptom Recognition
The boxer four-cylinder displays distinctive misfire symptoms. The flat-four's unique sound changes noticeably. Rough idle, vibration, and hesitation affect driving. Check engine light accompanies detected misfires.
Diagnostic Steps
Scan for all codes and check for TSBs affecting the 2024 model. Inspect ignition components for defects. Test fuel injector operation. Check for software updates. Dealer diagnosis ensures warranty coverage.
Warranty Coverage
Your 2024 Impreza is covered under Subaru's comprehensive warranty. Document symptoms and have dealer diagnosis for proper coverage on new vehicles.