i have 1994 prelude, with p13 computer installed in 1995 accord. i am currently getting a knock sensor code on my cel. only problem i have with this is how is it detecting knock if my computer has no wire to knock pin out. ive read up on the forum about grounding the knock sensor, but if the knock sensor has no resistance value and only looks for ground. why do you guys say to ground knock. but my main concern is why is it throwing me a knock sensor code with nothing connected to that pinout.