Fault description
WARNING: This page does not describe the selected car, but rather 52 other vehicles, including the 2013 BMW X6 M, 2013 BMW X5 M, 2013 BMW M6, 2013 BMW M5, and 2013 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.
Following engine start after a period of at least ten hours with the engine off the diagnostic function monitors the ambient temperature by running a plausibility check against the charge-air temperature (on engine-intake side of the intercooler) and the engine temperature.