A bad angle sensor can cause a variety of issues in your vehicle, from engine misfires to rough idling. Common symptoms of a bad angle sensor include difficulty starting the engine, stalling or hesitation when accelerating, and reduced fuel economy. Other signs may be illuminated warning lights on the dashboard such as Check Engine or ABS light due to an imprecise signal being sent to onboard computers regarding wheel speed and suspension position. Additionally there could be an abnormal amount of vibration coming through the steering wheel due to incorrect alignment readings causing tire wear and noise levels that are higher than normal while driving. It is important to note that all these problems can also be caused by other components in your car so it's best to have an expert diagnose before replacing parts unnecessarily.