The vehicle speed sensor (VSS) is a device that calculates the distance covered by your vehicle. The VSS measures the speed at which the vehicle is going.
Vehicle speed sensor functionThe vehicle speed sensor is a small device installed on the vehicle's transmission that lets the computer detect the speed you are moving. It is also known as a wheel speed sensor, transmission speed sensor, or output shaft sensor. The sensor calculates the rotation speed of gears and transforms the data into an analog signal which is transmitted to the vehicle's ECU. This information helps the ECU use the signal to adjust the car's speedometer display.
Common issues with a bad vehicle speed sensorA bad can lead to the transmission revving higher before going to another gear, the speedometer will be inconsistent, and the brakes will be harder than usual.