Knock sensors

[peter serovski]

Can noisy mufflers trigger knock sensor faults?has anyone had this problem before?

 

[Ginger Beer]

Can noisy mufflers trigger knock sensor faults?has anyone had this problem before?

Nope

If I understand it right, knock is detonation, so you are looking at a lean AFR

Pull your spark plugs and see what they look like

https://www.onallcylinders.com/2016/04/29/a-guide-to-reading-spark-plugs/