Alright I did a little searching and I dont know what to do...... My ecu is throwing a code 12 and a 23.... The egr valve and knock sensor. The guy that did my swap said I had no where to run the knock sensor and it hasnt thrown that code since my motors been in there till now....... And the egr valve is the other, one I have heard that I dont need the egr, but I dont know about it.... What should I do, I have a first gen b16 with the ecu that has the little led light so..... HELP PLEASE(searched)