Knock sensor counts when sensor not connected?

Folks-

I'm seeing in my log there are a few knock sensor counts when the sensor isn't even physically connected.

Any ideas what would cause this?

You have to provide +5V reference voltage to the knock sensor input. An open wire will be interpreted as constant knocks. Please refer to a wiring diagram for your ECU to find out which pins to connect.

Issue has since been resolved via harness repair. Also, there was only one wire going to it..