Yes, it is one of many things that can cause the check engine light to come on.
Oxygen Sensor. Or the Knock Sensor. Or you could check the plugs for faults.
No it will not. The knock sensor is used to adjust the timing.
If the knock sensor failed the CEL (Check Engine Light) would be illuminated and the engine may "ping" or "spark knock" under load. Serious "spark knock" can damage the engine if allowed to continue.
yes when it is not working properly
your knock sensor could need to be replaced
No it will not.
You need to test/replace the knock sensor. ireplaced it already.
the motor could pre-detonate or "knock" that can cause damage
If a knock sensor was bad, the check engine light would be illuminated and the code(s) set would indicate so.
Yep.
No it will not.
No, a faulty knock sensor will cause a code 43 normally. check for spark, diconnect a wire from a plug, install a plug in the wire, lay it on something metal, have an assistant crank the motor and watch for spark...