[WhatM3]

A couple days ago I went to run some errands and came back to my car and it wouldn't start. Not even turn over. The car wouldn't go into any gear and I got a whole list of codes. The next day I went back and after a couple minutes of trying it started up and drove it home with no codes. The following day same thing list of codes and no turn over. I just swapped a new motor in the car about 1200 miles ago and it runs great but now I'm having problems with the trans. It's 2011 335is dct. Anyone have any idea what it could be? I've searched and searched on google but couldn't find much on the codes [IMG][/IMG]

[Steve Sas]

Suspect you have a weak battery or bad grounding.

Check the different ground straps on engine and other areas on car.

Not familiar with grounding on these cars but im sure someone will chime in.

[relative4]

I'd start by getting the battery tested.