Can a faulty speed sensor be the cause of car cutting out?

Yes, a faulty speed sensor can cause a car to cut out. The speed sensor provides important data to the engine control unit (ECU) for optimal performance, including fuel injection and ignition timing. If the sensor malfunctions, it can lead to incorrect readings, causing the ECU to make poor decisions that may result in the engine stalling or cutting out. However, other issues could also cause similar symptoms, so it's essential to diagnose the problem accurately.