My daughter's has been showing for a day or two, and she took it into her garage. They kept it about 6 hours and said that they "had to re-program it".
I have no idea whether that was BS or meant a re-boot of the engine management, but I thought I'd run it past someone with a clue. ;-)
She's in California, BTW and the Mini is under extended warranty, so it cost her nothing. Garage bills seem horrendous in the US from other experiences they have had, so it's just as well.
Any comments appreciated...