UPDATE: Porsche now 1-2 overall after Acura DQ...
According to
Motorsport.com, during the post-race inspection, the Lowe's Acura ARX failed an engine restrictor test and was disqualified from second overall. This promotes the Dyson Porsche into second overall and second (obviously) in P2. The Audi TDI is promoted to third overall, first in P1. Porsches are now 1-2-3 in P2.
The restrictor test insures that the engines are getting all of their induction air through the mandated restrictor in the air box. A plug is stuck in the restrictor and the engine must quit running, or not start if it is already off. The Acura failed to shut down when the restrictor was plugged, indicating there was air getting through to the engine from somewhere else in the air box. The car passed the test prior to the race and the crew said the failed test was the result of the brutal Sebring track conditions pounding the car and causing cracks in the air box. No suggestion of anything intentional, just bad racing luck. Life's rough sometimes...