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.
your knock sensor could need to be replaced
yes when it is not working properly
No it will not.
You need to test/replace the knock sensor. ireplaced it already.
If a knock sensor was bad, the check engine light would be illuminated and the code(s) set would indicate so.
the motor could pre-detonate or "knock" that can cause damage
Yep.
No it will not.
Do you mean the knock sensor? It's a device that detects engine knock so that the computer can retard the timing. If the knock sensor isn't functioning, it could be a connector or the sensor.