Multiple issues...so lost
 

Thanks for reading and I'm sorry if I am reposting something.
I have a 2006 Town and Country 3.8L Touring Edition.

The problem started when we began to hear a slight knocking noise (from start while driving to finish, steady) and then it got very loud and very constant, worse when you first start. Stupidly, we continued to drive it and then it started stalling out whenever we came to a stop. Now it will not start at all.

Used an OBD reader, it threw one code: p0073, ambient air temperature sensor, which we cannot even find. We think it was knocked off while we were towing it. Even so, we are pretty sure this is not going to solve our problem.

Here is where we are at now: when we turn the key, we got electric power to the inside (lights, navigation, etc) but it doesn't even TRY to turn over.

Any ideas?

Sounds like you locked up the engine. Good news is they aren't that expensive compared to some. Try to turn the engine over by hand (with a big bar and socket)

Okay, I need to add some information/history:

The engine turns by hand, the starter was seized and has been replaced, two bearings (one over and one under) have been replaced, and the battery has been tested. It NEVER overheated and when we looked at the oil, even though it had recently been changed, it was bad.

Also, we replaced the bearings that were ruined: lower end, top and bottom.