Hyundai Elantra: Common Problems, Fault Codes & Repairs Everything for the Hyundai Elantra in one place — its common problems and reliability, the fault codes owners see most, and the tools to diagnose them. Hyundai Elantra fault codes Hyundai Elantra P0420Hyundai Elantra P0171Hyundai Elantra P0300Hyundai Elantra P0401Hyundai Elantra P0455 Hyundai Elantra specs & capacities Hyundai Elantra — Fuse box location & guideHyundai Elantra — Oil capacity & typeHyundai Elantra — Tire pressureHyundai Elantra — Bolt pattern & wheel sizes Recommended tools Automotive MultimeterCompression TesterBattery & Charging System Tester Read your code: OBD-II scanners →