A knock sensor is a crucial component in modern engines that helps prevent engine damage. It's essentially an electronic "ear" that listens to the engine for abnormal vibrations and sounds. How does Put Your iPhone in Ring or Silent Mode iPhone Not Vibrating on Silent or Ring Mode? 8 Fixes You Can Try Is there a way to still get notifications but with no noise? Without having my phone on silent? My dogs react more to the ring noise on my phone than they do Ever wondered what causes that knocking sound in your engine? It's all about abnormal combustion! Here's the real reason behind engine knock, explained step by step: 1. Air Fuel Mixture in Cylinder: Air and fuel