hey guys i apologise in advance im not very good with cars.

I recently have this problem where my emission light keeps turning on. So i took it to a honda specialist mechanic and they said that its a after market ecu and that they cant check whats the problem. They said usually they plug this led light thing to it and it tells u the error. However i have a hondata s200 he said and that i need to get the code or cd for it that original comes with and use a laptop to plug it.

Well the problem is this i bought the car like this, without the code or cd so where can i get this so i can fix the car? And if someone can give me a copy of the code or cd would be heaps good!

Thanks!