1. Oxygen (O₂) Sensor Explained — What It Does, Where It Is & How to Check Air-Fuel Ratio In this detailed video we explain everything about the car oxygen (O₂) sensor — what it is, how it works, where it’s mounted, and how it helps the ECU control the air-fuel ratio (AFR). Whether you’re a DIY mechanic or a car enthusiast, this guide covers both theory and practical checks you can do with basic tools. Call to action (use in video & description): Like, subscribe and click the bell if you found t

60K views · 162 reactions | As one of the most sensitive and critical components of your car's engine, it's important to know how #oxygensensors work! Learn more about the inner workings of this crucial part and its impact on air/fuel ratio. #thebestpartispeaceofmind #QualityTimewithDENSO #TheDENSODifference | DENSO Auto Parts | Facebook