2006 tacoma sensor question

I have a 2006, 4cyl, 237k miles, 5 speed manual tacoma.
Last week I performed a full fluid change in the truck.
I am a very picky person wen it comes to cars.
I pay too much attention to noises and performance.
So a few days ago I started noticing a very minor noise, its like or i am under the impression that might be a lifter noise but so hard to hear that can only be noticed wen the truck is accelerated and wen it’s slowing down after acceleration and the sound appears for a very small time, and sometimes wen driving but its so minimum that gets confusing.
So, yesterday the check engine light came on, i took the car to Autozone and the code is replace the knocking sensor.
Any ideas? The noise could be due to a faulty sensor? truck rides beautiful, strong, smooth engine, no issues performing at all. Thank you.

 

Typically knock sensors last the life of the truck, its the wiring that mice like to eat.

Usually I start by doing visual inspection. Wiring, and the sensor itself, sometimes they crack.

Ideally you'd diagnose it with a scan tool and watch its reaction to a hammer tap on the side of the block.

Start with a flash light and take a good long look at the entire engine. It's hidden on the side of the engine drivers side I believe.