I don't what to do about this car anymore

Hey everyone I hope all is good I’m currently having a problem again I have a e92 m3 2011 dct this all happened after I changed my oil and diff fluid has I was driving it was about a 2 hour drive I pushed to about 100mph during a little pull my exit was coming up so I slowed down and put it in automatic but when I was slowing down to a light I noticed my car didn’t wanna downshift at all so I put it back into Manuel and downshifted it launched the car forward no jerk it was like a power launch and there was a 5 second delay till it downshifted I pulled over turned the car off tried to turn it back on and it wouldn’t I let it sit for about 5 mins tried again and it turned on with a rough idle about around 900-970 but it stayed there solid no fluctuations at all I drove off back home since I was only 5 mins away when I got home I turned the car off but turned ignition on to read codes then my battery discharged light came on I read codes and only codes I got was o2 sensors for being catless and speed registration so I disconnected the battery for about a hour connected it back and reprogrammed it battery discharge went away I did a alternator test and battery test both passed took the car in a test drive and it was running solid idles was back at 500 as well but now i do notice a sucking in air noise before I need to shift like around 4k rpm I just don’t know what could have caused this I’m not sure if it’s electrical or what or a vaccum leak I checked hoses and everything looked good if anyone has a idea please let me know sorry for the long run off sentence as well and my bad grammer :/ it’s like every-time I do something good for the car a new problem comes

perx wrote

Hey everyone I hope all is good I’m currently having a problem again I have a e92 m3 2011 dct this all happened after I changed my oil and diff fluid has I was driving it was about a 2 hour drive I pushed to about 100mph during a little pull my exit was coming up so I slowed down and put it in automatic but when I was slowing down to a light I noticed my car didn’t wanna downshift at all so I put it back into Manuel and downshifted it launched the car forward no jerk it was like a power launch and there was a 5 second delay till it downshifted I pulled over turned the car off tried to turn it back on and it wouldn’t I let it sit for about 5 mins tried again and it turned on with a rough idle about around 900-970 but it stayed there solid no fluctuations at all I drove off back home since I was only 5 mins away when I got home I turned the car off but turned ignition on to read codes then my battery discharged light came on I read codes and only codes I got was o2 sensors for being catless and speed registration so I disconnected the battery for about a hour connected it back and reprogrammed it battery discharge went away I did a alternator test and battery test both passed took the car in a test drive and it was running solid idles was back at 500 as well but now i do notice a sucking in air noise before I need to shift like around 4k rpm I just don’t know what could have caused this I’m not sure if it’s electrical or what or a vaccum leak I checked hoses and everything looked good if anyone has a idea please let me know sorry for the long run off sentence as well [...]

Are you using a scanner capable of reading BMW specific codes? If not, a generic scanner will not have the ability to read those codes.

Brandoch wrote

Are you using a scanner capable of reading BMW specific codes? If not, a generic scanner will not have the ability to read those codes.

Yes I am I did just rescan it and it said a code about the paddle shifters

perx wrote

Yes I am I did just rescan it and it said a code about the paddle shifters

You have your lead now.

hope you figure this out man

Brandoch wrote

You have your lead now.

I believe it’s not the shifters codes are not present but I do have a new problem now vibration started in foot pedals only when idle tho and it’s on and off I say it does it every 8 seconds