Automatic Gear Fault

Hello friends. When I shift the car from P or N mode into gear, it switches with 2-3 seconds delay and gives this error. There is also the sound of locking the gear when starting or closing this car and it starts to do it when I press the brake and accelerator while constantly in gear. But not every once in a while, he makes this gear noise constantly. It never goes to the manual anyway. I read the other subjects here. We installed the computer in the service, changed the oil, other masters looked, but nobody says anything definite. I got the error 2-3 months ago, it disappeared and came again. I'm really sick of this error.

My teacher, I suggest in a completely amateur way, let me tell you from the beginning, the clicked sound of the vehicle only unlocks and lowers the gear lock when I press the brake, so I suggest changing the brake light at first cheap first change it, you look it works

Have the brake switch and gear position switch checked. In addition, if you connect your vehicle to an original peugeot device, you are likely to find a pinpoint problem.

Well I'll change it as soon as possible. I wonder if it's a possible situation to give this error because of the brake switch?