CalamityCarls

I have a 318 d sport (manual transmission) year 2012 which I bought in April this year. Last week an error message came up with a yellow triangle about the DRIVETRAIN. I took it to my mechanic who scanned and it said that the error was related to an automatic car and my car is manual! They reset and for a few days the light was out. It is not back on. Any advise on how to rectify problem? Many thanks