I recieved a no bus message on my Chrysler seabring v6. I replased the crankshaft position sensor and I am still recieving the message

 

"No Bus" means that the network that connects the car's computers to each other and to the things they monitor and control is not working properly. Changing the crankshaft position sensor is like changing a light bulb when there's a power failure in the neighborhood...it ain't gonna help.

This is not really a DIY issue. You're going to need some professional help.

 

Worth a try – disconnect the battery for 10 minutes.
You can also pull the computers plugs check that all the connectors are clean, and reconnect.
Also make sure you have a good charged battery.
If it turns out to be a bad computer(s), there are companies that sell refurbrushed units programmed specifically for your car.