What does error 2003-D means ?

I had a problem with my trackpad recently that started mooving on its own. I restarted my computer and after that the click function ran out. I ran the diagnosis (pressing D while restarting the computer) and the 2003-D error appeared. I saw many people having the same problem but no reply on the issue.

I did many stuff - rebooting my mac, checking SMC and clearing PRAM, reseting my mac with factory parameters. The clic function doesn't work. When I plugg an external mouse, it works as soon as I don't touch the pad. If I do it, the clic (right clic) on the external mouse stop functionning, and I need to restart the diagnosis (pressing D) and then the external moose is working again (pretty weird I know).

By the way I never had this error 2003-D message again.

Some random reparator told me that I need to change the motherboard, but I doubt that the problem came from it.

Any insights ?

Thanks a lot !