Diagnosed P0420

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! A P0420 code on your Santa Fe Sport points to the catalytic converter's efficiency being below the threshold. Essentially, your car's computer thinks the cat isn't doing its job well enough. Even though your vehicle drives fine, the check engine light's giving you a heads-up that something's not quite right in the emissions system. Sometimes, a faulty oxygen sensor can trigger this code. So, it's worth checking the sensors before jumping to replace the catalytic converter, which can be pricey. If the sensors are good, it might be time to think about replacing the cat itself. If you need any further advice or if you'd like any help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554!