Do you have iDrive?
If you do hit the "i", select "info source" then "service" (if I remember correctly) and see the list of systems and if they are all green.
If you don't have iDrive I don't know.
My E91 does the same at times. Turns out it is the "State Inspection" (not required in my area) due soon. spoke to a SA and he says no rush, just have the thing resetted at the next service.
2008 E90 335i | Silver Grey | Terra | Piano Black | ZSP | ZKO | ZAT | ZKI | ZPL | ZKL |
2007 E91 328xi | Black Sapphire | Terra | ALuminium | ZKO | ZKI | ZPL
Past Cars: 2004 ///M3, 2002 E46 330xi, 2003 GTI 1.8T, 1996 Neon