You shouldn't knock is detonation -preignition for some reason, possibly a timing issue. Exploding gases in your cylinder at the wrong time can possibly break pistons.
you will have a knock sensor code and the car will run slugish. when a knock sesor code is set its retards the timing so the engine will not detonate. the easyiest way to fix it is relocating the sensor.
Yes, you should always run your vehicle with its Knock sensor.
Yes
yes it can. also check knock sensor and the wire going to it
You have another problem other then the knock sensor if the engine will not start and run. A knock sensor will not cause the engine not to run.
No it will not cause it not to run.
If the knock sensor isn't working, the computer won't be able to tell that anything is wrong. Run a diagnostic code anyway. Sometimes it won't turn on a light if it's just a knock sensor.
No it will not.
it could cause your truck to run in limp mode due to the truck thinking it has a misfire or it could in some cases cause poor fuel economy and plug up your catalytic converters
No.
Yes
If your car would run lean the sensor would not be able to determine that and their could be engine damage.