Related Problems of the 2010 Chrysler Town & Country

problem

The key was lost, so I had a locksmith replace it. Later in the next week, my husband had another key made, and I drove it for about a week, then when I was driving on an interstate at 65mph everything quit, including the power steering. I was lucky to get it pulled over to the side of the road. I took it to my mechanic, who thought it might be the computer b/c several different problems came up on the diagnostics. They could not fix it, so I had it towed to a bigger automotive place, who replaced an engine oil pressure switch but it still would not start or run so they suggested sending it to Chrysler. Now I'm having it towed to tri lakes Chrysler in branson mo who says they don't know if they can fix it.