How do u fix a code P0320

First started when I changed the termostate, engine died when engine became hot, after cool down started up again, ran for awhile, then when shut engine, wont start up again, bought a scan tool, got p0320 code, changed ckp and cmp, coil, checked wires, connectors ect, dont have a spark from wires, got power to coil, autoshutdown working.