I bought a mustang”gt” it was listed however I went to see it and realized it was a base 2004 with a 4.6l swapped engine and tranny with it I bought it anyway but now I’m trying to figure out why there’s so many codes regarding open circuits in cylinders as well as when I press the break or turn the wheel there’s a loud ass buzz sound to it. He did say it needed a new computer not sure what he means I could use help I’m a lost soul at the moment