If your 2022 Subaru Impreza is displaying a P0305 code indicating a cylinder 5 misfire, this code requires diagnostic investigation. The 2022 Impreza uses a 2.0L naturally aspirated flat-four engine as its sole powertrain. With only four cylinders, P0305 is technically anomalous.
2022 Impreza Powertrain
The 2022 Impreza uses the 2.0L FB20 flat-four producing 152 horsepower across all sedan and hatchback variants. This Subaru boxer-configuration engine has exactly four cylinders numbered 1-4.
Understanding the Anomalous Code
Since the 2022 Impreza has exactly four cylinders, a P0305 code cannot represent an actual cylinder 5 misfire. This is an erroneous diagnostic code.
Possible Causes
ECM software issues can store invalid codes. Scan tool communication errors may misread data. Low battery voltage affects ECM reliability. Aftermarket diagnostic tools may have compatibility issues with Subaru electronics.
Diagnostic Steps
Use a Subaru-compatible scan tool to verify codes. Test battery condition. If actual misfire symptoms exist, diagnose cylinders 1-4. Clear the erroneous code and monitor.