206 gearbox problem

Hi aleyküm I have a 2000 model 1.4 xr, like most 206s, there is a transmission problem in my vehicle for a while. When the snow and sports mode lights started to flash, the lights went off when I turned the ignition off and on, but yesterday, when I was driving normally, the snow and sports mode lights started to flash, I turned the ignition off and on, the lights were still flashing. There is no problem in gear shifting, but the lights are flashing, even with half ignition, the snow and sport mode lights flash. does anyone know what the solution is? how should i go about

Before making a waste of money, connect it to the original device and have the error codes checked. What matters is the error code. But on the original device.