PCM update, do I have to go to Hyundai Dealership

what update? copy and paste the link below.... https://repairpal.com/check-engine-error-code-of-p200a-cant-find-a-good-explanation-377

Good research there from 1clubinside -- But to address the rest of your query -- Hyundai (as with all vehicle manufacturers) produce software to update various vehicle components as needed during the useful lifespan of a vehicle. These updates are often to aid proper component operation, prevention of the deterioration of certain components, and improved performance end economy. As such, anytime a manufacturer releases a software update that affects engine performance and emissions, they must obtain certification from both the federal and in some cases state governments that have emission laws. Once they are certified, they are available via download to dealerships for their trained technicians and diagnostic tools to be able to deploy them to vehicles. Because of these controls, and the proprietary nature of the software, most non-dealership repair facilities will not be able to update software. Repair facilities can opt to buy into the manufacturer software and diagnostic tools, and as such can have that capability too -- but the vast majority do not choose to invest in such software and tooling due to it being a highly unreasonable investment relative to being able to make a living. Dealerships, on the other hand, are mandated by their parts and service agreements with vehicle manufacturers to purchase and maintain the highest level of diagnostic tools and timely software in compliance with manufacturer rules. This is also why it generally costs more to service at a dealership! The overhead cost of doing business is far higher than at an independent shop. Lastly -- software updates are usually and most often NOT the answer to your problems. Often times there are concerns with physical components or wiring that must be resolved. Folks commonly think that updating software or "replacing a computer" is some magic answer to so many vehicle issues, and it simply is not. All concerns must follow a diagnostic process to resolve. Verify client concern. Troubleshoot by diagnostic trouble codes OR by symptoms alone. Confirm the cause of failure. Repair the vehicle and confirm it has been repaired. This may or may not include a software update.