My scanner isn’t picking up any codes nor is it communicating to the dlc. All fuses good and relays but no spark no fuel just air. What could this be. I’ve tried crank shaft position / cam shaft still nothing car was running fine before it stopped communicating. Replaced all 6 spark and coils. Both keys crank no start

 

In my case, it was turned out to be the ignition switch. It is a relatively cheap part and easy to replace.