air bag light on, plus, when turn right the horn blows without touching. Since horn is in same are as air bag, probably some connection. Any thoughts?

They might be connected, but for your horn the ring inside the steering column needs to be cleaned, this is a common issue with the newer cars, after a while dirt/dust and rust makes the ring make contact with the triggers, as for your air bag I would get that checked by a professional. Hope this helps, best of luck.

Could be that the clockspring is going bad. The clockspring in the steering column allows for constant electrical contact between the airbag and the electrical system, no matter what the wheel position. When clocksprings go bad, airbag lights come on, horns stop working or work unusually, etc. Have the airbag codes pulled by your Porsche dealer and go from there.