If your 2022 Subaru Outback is displaying a P0305 code indicating a cylinder 5 misfire, this code requires diagnostic investigation. The 2022 Outback offers only four-cylinder engines: the 2.5L naturally aspirated flat-four and the 2.4L turbocharged flat-four (XT models). Neither has a cylinder 5, making P0305 technically anomalous.
2022 Outback Powertrain Options
The sixth-generation 2022 Outback offers the 2.5L FA25 flat-four (182 hp) on standard models and the 2.4L FA24 turbocharged flat-four (260 hp) on XT trims. Both are Subaru's signature boxer-configuration four-cylinder engines. The flat-six option was discontinued after 2019.
Understanding the Anomalous Code
Since the 2022 Outback has exactly four cylinders numbered 1-4, 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's electronics.
Diagnostic Steps
Use a Subaru SSM or compatible scan tool to verify codes. Test battery condition. If actual misfire symptoms exist, diagnose cylinders 1-4. Clear the erroneous code and monitor.