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What is UEFA Champions Leaguethe reason why the engine light is always on: Decoding the reason why the engine fault light is always on Nowadays, most cars have been equipped with engine fault lights. Once a fault occurs, this light will light up. If the engine fault light is always on, the car owner must find the cause and solve it as soon as possible. In this article, we will decode some common reasons why the engine fault light is always on and provide solutions.1. Oxygen sensor problem Oxygen sensor is a very important sensor that can monitor the oxygen content in the engine emission system. If the oxygen sensor fails, it will cause the engine to work irregularly or even fail to start. At the same time, the engine fault light will also be on all the time. If your vehicle has driven more than 100,000 miles, it is likely that the oxygen sensor needs to be replaced. Two. The problem of the pressure sensor in the engine compartment. The pressure sensor in the engine compartment is a device used to monitor the pressure in the engine compartment. If the sensor fails, the engine may have problems such as oil outage or insufficient oil supply. In this way, the engine fault light will also turn on. If you find that the vehicle consumes too much fuel or the engine is unstable, you should consider checking the status of the pressure sensor in the engine compartment.3. Fuel pump problem The fuel pump is responsible for supplying gasoline from the fuel tank to the engine. If the fuel pump fails, it may cause the engine to stop running, and the engine fault light will also turn on. If you find that your car can't start or can't start for a long time, it may be caused by a fuel pump failure. Four. Ignition system problems The engine ignition system includes key elements such as ignition coils, generators, ignition plugs, etc. Their abnormalities will cause the engine to fail to run normally. If the ignition system fails, the engine fault light will also be on. If your vehicle has a problem starting, the engine noise is abnormal, etc., you should consider whether the ignition system is faulty. 5. The problem of supercharger. In some cars, the supercharger can provide more power to the engine. If increaseIf the compressor fails, it may cause the engine to lose power, the engine fault light is always on and other problems. The state of the supercharger may require a certain level of skill to judge. It is recommended to find a professional technician for testing. The faults mentioned here are common reasons why the engine fault light is always on. For these problems, we recommend that you find a professional technician for maintenance as soon as possible. Whether you have the ability to repair it or not, it is best not to try to repair it easily, so as not to cause greater losses. At the same time, you are also required to maintain your car regularly, which can extend the service life of the car while avoiding breakdowns.

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