NHTSA complaint #11569684

Owner complaint summary

We were driving up a mountain pass in a great deal of stop and go traffic. The engine died and a check engine light came on. It was difficult to get the engine started, but it did start. We called the genesis service line and they said that it was a warning and ok to drive but to take it into be looked at. We proceeded up the mountain pass slowly, but when we were out of traffic and needed to give the engine gas to accelerate up the hills, the engine would not speed up. We were driving on interstates where we could only go 25 mph up the hill when others were speeding by us driving 60+ mph so we had to drive with our hazards in the right lane and hope not to get hit. When going down the hills, the engine would speed up, but any hills meant the speed would decrease even when you were engaging the gas. According the warnings we receive via Genesis in my app, the problem was Diagnostic code P0087F0 and said it was powertrain and the subsystem was EMS. We took the vehicle into the dealer and they were unable to recreate the problem. They reset the computer to the manufacturer reset. The vehicle is available for inspection upon request. This should not be happening on a 2023 car with 5000 miles on it.