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What is Europa League appthe reason for the yellow light of the engine? Reason revealed: car engineThe reason why the yellow light is on is that the engine yellow light on the car often appears, but many people don't know what the reason is and have not taken appropriate measures to solve it. So, what causes the engine to turn on the yellow light? Today, we will reveal the secret for you. First of all, you should know that when the engine yellow light is on, it is the fault diagnosis system of the car that has detected a fault of a part of the vehicle. This system is used to monitor the electrical and electronic components of the vehicle, including the engine, steering and other systems. When it finds a problem, it will turn on the engine yellow light. So what are the specific reasons why the engine yellow light turns on? 1. Oxygen sensor failure Oxygen sensor is a very important component in the engine emission control system. Its function is to detect the oxygen content in the exhaust and feedback the results to the engine control module (ECM).If there is a problem with the oxygen sensor, the performance of the car will be affected, including fuel economy, power, etc. Therefore, when the engine yellow light is on, the failure of the oxygen sensor may be one of the reasons. Two. Air flow meter failure Air flow meter is also a very important part of the emission control system. Its function is to measure the air flow into the engine and feedback to the ECM. If the air flow meter fails, the fuel economy, power and other aspects of the engine will also be affected, resulting in the yellow light of the engine. 3. Vehicle emission system problem If the emission system fails, the engine yellow light may turn on. The emission system is designed to monitor and control the emission gas. If the emission system fails, the vehicle's emissions will not be controlled, resulting in the yellow light of the engine.Four. Fire failure Fire failure is relatively common in vehicles, and it usually causes the engine to turn on yellow. Fire failures may be caused by failures of electrical components such as ignition systems and oil pumps, which will affect the fuel supply and ignition system of the vehicle, which may cause fire failure. 5. Engine sensor failure Engine sensors are also an important part of the engine control system. They can detect various situations inside the engine and feedback these situations to ECM. If the sensor fails, the ECM will not be able to receive the correct information, which will cause the engine to turn on the yellow light. Therefore, if you find that the engine yellow light on the car is on, it may be caused by one of the above reasons. When you see it light up, the best way is to stop immediately, find the cause and fix it as soon as possible.If you don't understand, you'd better find a professional to do further diagnosis and repair. In a word, it is not a big problem for the engine yellow light to turn on. As long as we take appropriate measures in time, we can avoid more serious consequences. Every time we find a problem, it is an opportunity for us to become more professional and experienced by learning and improving from it.

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