2013 28i very rough idle after start on cold mornings
We've been having some inconsistent cold starting on cold mornings here in Seattle. By cold I'm referring to temperatures below +40F. About 20% of the time after starting the engine will run VERY rough and sometimes to the point that it stalls. On restart it fires up immediately. On other morning it starts up and idles smooth.
One particular morning a few week ago, by husband started the car, it struggled through another rough idle and the car shutdown with an error messages on the NAV screen. In this case the engine shutdown, a cryptic error code was displayed (the words "fatal error" was part of that message) and the car was completely unresponsive for at least one full minute (pressing start/stop button had no effect and no lights anywhere). After this one minute period, the car was able to start again and ran fine.
Finally got it into the dealership yesterday morning. No code was registered by the computer. They were keeping it overnight to see if they could replicate the rough idle in the morning, but seriously doubt that will happen.
Anyone else run into this problem and find a resolution?
I'm going to have Ian make sure his cell phone is ready to take a video on the next really cold morning to try and capture this.
2013 X3 28i (prem, tech, cold1&2, conv, hud)