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Cars are Top trade research databasesan indispensable part of modern people's lives, especially in cities. It is a convenient and fast means of transportation. However, you may be a little confused when the engine yellow light turns on. This article will discuss the reasons why the yellow light of the car engine is on and how to deal with this situation. I. What is the yellow light of a car engine?When the yellow light of the car's engine lights up, it is usually a fault indicator light, also known as the "check engine" light. The function of this indicator light is to remind the owner of the vehicle's failure or maintenance needs. When a fault occurs, the car's computer will detect the status of the engine and store the fault code in the vehicle's computer system. These codes allow car repairers to identify and solve problems. II. The reason why the yellow light of the car engine is on 1. Air flow meter fault air flow meter is a device that quantifies the air intake into an electrical signal, which can help the vehicle management system control the amount of oil. When it fails, the vehicle's computer will record and turn off the engine. Two. Battery failure may also cause the yellow light to turn on. This situation is usually caused by the low battery voltage. If this causes yellowThe reason why the light is on is that once the battery is replaced or the battery voltage is increased by charging, the yellow light should disappear. 3. Gas discharge system failure The gas discharge system of the car consists of many sensors and valves, which are connected to the car's computer. If a sensor or valve in the gas discharge system fails, the car's computer will record the fault and turn on the yellow light. Four. Exhaust sensor failure Exhaust sensor can detect the oxygen content in the exhaust gas at the rear of the car and tell the car's computer how to adjust the fuel and air mixing ratio of the engine. If the exhaust sensor fails, the contour light will light up. 5. Fuel vapor emission system failure The fuel vapor emission system is used to capture and control the steam in the engine fuel system. If fuel vapor emissions are foundIf a sensor or valve fails in the system, the car's computer will record the fault and turn on the yellow light. III. Handling method When the yellow light of the car's engine lights up, it is best to find the cause immediately and take corresponding measures. After studying the operation manual of the car, the owner can drive to receive a professional inspection in order to solve the problem. Here are some useful tips: 1. Improper maintenance of the car will cause the engine to turn on the yellow light. It is recommended to regularly check the fuel content, tire pressure and some major parts of the vehicle (such as brake system, battery, etc.) to ensure the normal operation of the vehicle. Two. Emission system inspection If a sensor or valve in the car exhaust system fails, the owner can check the exhaust system to determine which part has a problem. 3. Let the technician checkIf the car owner is not sure whether he can solve the problem, he'd better go to the car repair center for professional help. Professional technicians will use specific tools and techniques to check the car and confirm the specific cause of the failure. IV. Conclusion When the yellow light of the car's engine lights up, the owner does not need to panic. Understanding common fault codes and the causes of different faults can help car owners better understand the car. If you are not sure what steps need to be taken, please go to the car repair center for professional help. Finally, regular maintenance and normal operation of the car can extend the service life of the car and reduce the maintenance cost.

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