Gotta reset the computer, just disconnect the negative battery terminal and push the brake pedal down (the lights trying to come on will drain any juice left in the system). Your ECU will remember any codes it's triggered till it's powered down or reset. I can't imagine you wired in a knock sensor wire without disconnecting the ECU though? Is it still throwing the same code. You ran the wire to D3 correct? How did you connect it to the ECU plug?