okay so i searched through what felt like hunders of threads looking for something that might take a few minutes to answer, well i got a code 52 knock sensor signal and was wondering where its located on a sc300, i found threads mentioning the 400s location but no help to me, she runs perfect just no revving passed 4000rpm, any help would be greatly appreciated

 

theres 2 located under the intake manifold screwed into the block. You can get to both of them from underneath. Usually the wiring to them is what's f'td up.

You can buy the knock sensor wire harness by itself...I have one new in the bag still if you need it.