2000 Volvo V70 has 4 codes 0600 0717 0722 1618. Whats the link. all at once?

Question

Where do i start. multiple lights on the dash. engine stalls sometimes, other things happen and it all started at once. Think the lights blinking and on solid are from 2 or 3 computer sigals that go to a main computer. How can i troubleshoot it, and where to start? Greg