Why does the car suddenly fail to start?
2 Answers
The reasons why the car suddenly fails to start: 1. The car is out of fuel; 2. The crankshaft position sensor is faulty. If the car has very little fuel, or the fuel gauge shows that it is below the red line, it naturally won't start. The crankshaft position sensor is a sensor shared by the ignition system and the fuel injection system. If the crankshaft position sensor fails, the computer cannot detect the speed signal and cannot determine whether you are trying to start the engine, so it won't start. You can check if the starter has any faults. If the starter is spinning at high speed but the engine doesn't respond, the problem may lie with the starter. If the starter doesn't move, it could be an issue with the wiring, such as a burned-out power supply line from the battery or a damaged starter relay.
I bet your car not starting must be frustrating, but don't worry - many drivers have faced this situation. The most common culprit is battery issues, whether it's an aging battery losing charge or voltage fluctuations during extreme weather. If you hear clicking sounds when turning the key but the engine doesn't crank, it's likely a stuck starter motor or poor contact. Fuel system failures also occur frequently - a faulty fuel pump cutting off supply, or dead key fob batteries triggering anti-theft lockouts. Ignition system problems like severely carbon-fouled spark plugs or failing ignition coils are other possibilities. From my repair experience, electrical issues such as blown fuses are also quite common. For safety, avoid repeated cranking attempts - stop after the second failed try and call for roadside assistance or professional help immediately. Performing monthly battery health checks and terminal cleaning can significantly reduce unexpected breakdowns.
