Nomercyj

So my maxima key broke and I needed a new one I called a locksmith and he came over and it wont program I'm getting 3 service engine lights u1000 u1001 and p1612 the first two is the computer isnt communicating within 2 seconds so i replaced the ECU and the bcm and had him come back and still wouldn't program the new key I've checked all my ground connections and all the fuses and the connections on the ECU I'm completely lost on what to do next and was hoping for any ideas to try i also noticed my windshield wipers stopped working and my headlights stopped working