964 C4 - interlock mechanism warning light
 

The warning light that looks like the two connected differentials came on while I was drifting a corner on track. The manual says this is the interlock mechanism warning and if it comes on you should adjust your driving to the changed driving characteristics of your car and to consult your Porsche dealer,or something like that (I don't remember word for word).
After re-setting the computer by turning the ignition off and on the warning did not re-appear.

It did seem like I couldn't put as much power down on corner exit while the warning was on. Sort of like not having a limited slip differential.

What is this interlock mechanism? And does the warning mean something has failed even though it did not come back on after reset?