This is a wiring fault. or a bad knock sensor. The LT motors used 2 knock sensors but were both tied into the same wire and went to the same pin in the old controller. For the newer pcm, both knock sensors are supposed to get their own wire back to the pcm. If you have a code for knock sensor on b2 then you are wired wrong, your wire has chaffed and is touching ground or broken, or you have a failed knock sensor.