Diagnostic data from sites like Drive2 and Bimmerpost suggest these common culprits: BMW EGR Valve problem, identification and solution - solved
A failing Exhaust Gas Recirculation (EGR) valve or a cracked EGR cooler/radiator can cause air plausibility errors. bmw 2ddd00
If software fixes fail:
Code is a serious fault that indicates a failure in the "brain-to-muscle" connection between your engine computer and the turbo. Diagnostic data from sites like Drive2 and Bimmerpost
Drivers may experience the following when this code is active: illumination. Engine Hesitation or sluggish acceleration. Rough Idling or sporadic idle fluctuations. bmw 2ddd00