[fabini96]

It seems that you do not need to change anything on PCB.
First you have to downgrade the firmware using OCflah to fw1.39
Then use OP-COM 181022a EN to upgrade authomaticaly the firmware to fw1.67.
You do this by your own risk because if the interface it is still working then you have a good/orginal PIC18F458 but if you haven't then this MCU will be blocked forever and you have to replace it with brand new original flashed PIC18F458.
You will need an external Pic Programmer and you can flash the MCU using the programming pads on the PCB. ( your hardware PCB has programming MCU pads ).
Good luck

P.S. - when you change the MCU and you will need to do modification on PCB ( here you have how to do it https://cartechnology.co.uk/showthread.php?tid=5443 ) you will do it only if you cannot connect to the K-line cars.

Tank you, i actually have seen the programing pads, i think that the pcb is good quality just need to make sure that is original pic, witch i dont think so but lets see, i will buy original 1 first to have backup if something go wrong, than just replace it program the new pic.