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The Global trade documentation standardsengine is always on the yellow light - How to effectively deal with the failure of the engine oxygen sensor When you find that the engine warning light on the instrument is always on the yellow light while driving, indicating that your engine oxygen sensor is faulty. This problem needs to be solved as soon as possible, because the failure of the oxygen sensor will affect the performance, fuel economy and emission level of the vehicle. In this article, we will introduce the function of the oxygen sensor, the possible causes of failure and how to effectively deal with the failure of the engine oxygen sensor. Function of oxygen sensor Oxygen sensor is a sensor assembled in the exhaust pipe of a car. Its main function is to measure the oxygen content in the exhaust and send the data to the engine computer. The engine control unit (ECU) uses this data to adjust the mixed gas.Proportion to ensure that the engine runs in the optimal combustion state and minimizes harmful emissions. Causes of oxygen sensor failure 1. Sensor aging: Oxygen sensors will gradually fail due to service life problems. Like all mechanical equipment, they need to be replaced regularly. The lifespan of most sensors is about 100,000 miles. Two. Pollution: The oxygen sensor is located in the discharge pipe, and the pollutants will be deposited on the sensor and affect its performance. These pollutants can be oil stains, chemical waste gas, moisture or sediment. 3. Connection failure: There is a circuit between the driver of the car and the engine. If any line in this circuit is damaged or the connection is loose, it will affect the performance of the sensor. Four. External force damage: When you drive a car, your vehicle faces a variety of situations on the road, such as holes and stones.If your oxygen sensor hits these obstacles, it may fail. Signs of failure of the oxygen sensor 1. The engine fault indicator light (MIL) lights up, indicating that there is a fault in your emission control system. Two. Unstable idling: If your car shakes at idling, there may be a problem with your oxygen sensor. 3. Decreased fuel economy: If your car has obvious problems with fuel consumption, this may also be the reason for the failure of your oxygen sensor. Four. Exhaust pipe corrosion: If there are signs of corrosion in your car exhaust pipe, your oxygen sensor may have been damaged. Dealing with oxygen sensor failure When your engine fault indicator light lights up and shows oxygen sensor failure, you should take the following measures: 1.Check the sensor: Check whether there are any pollutants or sediments in your discharge pipe. If pollutants are found, please keep the discharge pipe clean. If there is too much sediment on the discharge pipe or causes serious damage, the exhaust pipe item needs to be replaced. Two. Replace the oxygen sensor: If the oxygen sensor is very old or damaged by external forces, the sensor should be replaced directly. 3. Repair or replace engine components: If your oxygen sensor has been checked and replaced, but the problem has not been solved, you may need to repair or replace other components in the engine, such as oil, air filter, ignition system, and fuel and other sensors. In summary, it will continue with the service life of the car. Growing, the failure of oxygen sensors has gradually become a problem that must be solved by car owners.Detecting and solving these faults in time can keep your car efficient, low emissions, low fuel consumption and high performance. If your engine fault indicator light lights up and shows an oxygen sensor failure, please pay attention to regularly check the sensor and other engine-related components. Don't ignore any problems, solve the problem of the vehicle in time, and let it get the best performance.

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