On my Nissan, I went with a "do not try this at home" approach.
Dipped the sensor in plasti-dip a few times, let it dry, and remounted it on the block. De-sensitized sensor...check!
Not recommending that approach to anyone, but it worked quite well. I would not want to do that on a turbo motor.
Looks like our sensors aren't that expensive and are under the intake manifold. Not sure how accessible they are.
Just other food for thought, I've heard of things falsely setting off knock sensors. Like clunking motor mounts, rubbing exhaust, etc. Anything that transmits a vibration/frequency through the motor can be misinterpreted.
