Samsung SM5 problem

Knights I hope you can help me, my old man's car is a Samsung Sm5 of the year 2007 the story is that when on the occasion you go on the road and go down and melts the accelerator and it does not accelerate, no light is turned on on the board and you go in fifth but at the time of placing neutral they lower the rpm and turn on the contact lights, I am blaming a mini processor that carries inside the housing today. To see if it fails because after you stop

Could you leave cleaning with alcohol or clean the tps, what miniprocessor "do you refer to the ECU of the car?

The best after seeing that with cleaning the problem is not solved, it would be to diagnose through a scanner the problem.

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