[sum1else]

Last night I rigged the Rear Fog Lights in my '06 E90. I put it back in, and everything works fine. I didn't screw anything up while I had the unit open.
After about 10 minutes of driving a weird indicator light came up on my little screen, it looked like a bolt going into my car. This picture was not in the back of my BMW manual. This light went away after about 5 minutes, and now the Check Engine light is on.

Can anyone provide any insight as to what I may have done inadvertently, or where i can find more info about the indicator lights that aren't listed in the book? Maybe its just a coincidence that something happened at the same time that I was working on the car?

I also hard-wired my radar detector into the car the day before, but it was not connected at this time so the circuit should have been open and not interfering with anything

Thanks