Your oxygen (O2) sensors are small but mighty — they help your engine run efficiently, cut emissions, and prevent costly damage. With the right OBD-II scanner and a bit of know-how, you can decode ...

So your car’s transmission is acting up or throwing a heart-stopping fault code and you want to find out if the speed sensors are causing it? Fabulous. Your car’s transmission speed sensors are vital ...

I have a Dodge that I suspect the VSS is going bad on. The speedometer jumps around sometimes, and is frequently off by 10mph or more. I called Dodge and they suggested replacing the VSS as a start.