Subaru Outback: Common Problems, Fault Codes & Repairs Everything for the Subaru Outback in one place — its common problems and reliability, the fault codes owners see most, and the tools to diagnose them. Subaru Outback fault codes Subaru Outback P0420Subaru Outback P0171Subaru Outback P0300Subaru Outback P0401Subaru Outback P0455 Subaru Outback specs & capacities Subaru Outback — Fuse box location & guideSubaru Outback — Oil capacity & typeSubaru Outback — Tire pressureSubaru Outback — Towing capacitySubaru Outback — Bolt pattern & wheel sizes Recommended tools Automotive MultimeterCompression TesterBattery & Charging System Tester Read your code: OBD-II scanners →