o2 sensor. not a big deal just figure out which one it is. if u have a gutted cat or no cat youll usually throw that code

map sensor. what are u using to bypass it for boost? check valves or missing link? check that

knock sensor. not a good code to be throwing. check to make sure u did accidently fuck it up when canged your oil or something. theyre really delicate. hopefully your car isnt actually knocking. no intercooler makes that a lot easier to do.