Drives : Nissan NV200 Flies : Rans S6ES
Although you say the brake lights are working, that doesn't necessarily mean the brake light switch is working properly. There are actually two brake light switches inside the switch housing. One switches the brake lights on at the back of the car. The other sends a signal to the engine ECU. The switch for the lights could be working and the one for the ECU might not be. A couple of quick voltage measurements at the switch with the pedal pressed and released would tell you if the two switches are working properly. You can also check them on the scan tool data list. But I think you'd need a professional level/Hyundai specific tool to see both. I don't think a generic OBD2 tool will show them both.Other things to check?