warped rotors , brake
knocking noise
IT is your CV Joints which is making this noise.
Your transmission fluid might be low.
A forgotten tool maybe ? Or a stone .
It might be a CV joint, when the CV boot is ripped and the grease is partly gone , then it makes noise.
a door fitting which makes a noise to attract the attention of someone inside is a peephole
Someone who accidentely trips on their way to the toilet and slightly hits the seat in whick it makes a knocking noise.
NO. A knocking noise in the engine is a problem in the engine.
I get knocking & ping noise coming from the fuel injectors
A "knocking" noise sounds like a bad connecting rod bearing. You may be ready to "sling a rod". These engines are famous for it.
A bad harmonic balancer can cause a knocking noise. The harmonic balancer doesn't actually produce the noise, but it can cause the noise in the engine.