Speed sensors work by assessing the overall speed that the vehicle’s crankshaft is spinning at. All vehicles have a specific maximum speed that they cannot go higher than. If a driver tries to push their vehicle beyond the maximum speed, this can have major repercussions for the vehicle’s engine. Speed sensors work to tell drivers how fast they are going to ensure that they are both within the speed limits of the road and their vehicle. When this sensor is having trouble, drivers often notice that features like cruise control and the speedometer are not working properly. Replacing this sensor quickly is important to keep your vehicle in top working order.