Knock Sensor

Had a strange experience with a knock sensor on my 2000 Tacoma 2.4L.
Last Friday a car pulled out in front of me so that I had to slam on
the brakes. Later I noticed the check engine light was on. Maybe a
coinceidence?? Saturday a local Advance Auto diagnosed the check
engine light as an open or short in the knock sensor circuit. I
measured the resistance of the knock sensor at 160 ohms.

When I and my son removed the sensor it was extremely tight. It
gave out a very loud crack. Before taking it to get a new one I
checked the resistance, it was now open! !

Reinstalled it and reset the check engine light and the truck runs
great without a check engine light. It has run two days, about 350
miles, and runs fine.

Ideas or explaniations please..............Jay