How To Judge The Failure Of The Oxygen Sensor Through The Change Of Color!

The oxygen sensor is a key feedback sensor in the engine control system. It is a key part to control automobile exhaust emissions, reduce automobile pollution to the environment, and improve the quality of automobile engine fuel combustion. Then, as an important component of the car, the oxygen sensor should learn how to judge the failure of the oxygen sensor.

To put it simply, the oxygen sensor can be regarded as a special screw. There are one on the front and back of the exhaust pipe. They are used to monitor the oxygen concentration in the exhaust gas, but the ultimate purpose is different.

The oxygen sensor on the inside is mainly to know whether the air-fuel ratio in the cylinder is appropriate and to ensure the full combustion of the fuel. If the air-fuel ratio is not appropriate, the fuel injection quantity will be controlled to achieve balance; the oxygen sensor on the outside is mainly to know Whether the three-way catalytic converter is useful, monitor whether the exhaust gas is discharged normally.

Next, the editor tells you a small coup: by looking at the color of the oxygen sensor to judge whether there is a fault, what is the fault!

Four colors, four “health conditions”?

Gray: The most “healthy” color. The light gray is the color of the oxygen sensor itself. The oxygen sensor can be made of many types of materials. For example, the most commonly used is titanium dioxide. Only the oxygen sensor in this state can fully play its role!

White: The oxygen sensor appears in white, indicating that your fuel or engine oil contains silicon element. Because it cannot fully burn itself, it will cover the oxygen sensor under high temperature. It is found that the white oxygen sensor must be replaced in time.

Brown: The oxygen sensor appears brown, mainly because the fuel contains too much lead. In the past, there was no strict requirement on the content of lead in the fuel. Therefore, it is not uncommon for the oxygen sensor to be covered by lead. It is strictly required to use unleaded gasoline, so the situation of the oxygen sensor being contaminated by lead elements has been well improved. However, it is still not ruled out that some people may add inferior gasoline, which causes lead pollution (also called lead poisoning). At this time, it also needs to be replaced in time.

Black: The oxygen sensor appears in black, indicating carbon deposits! The oxygen sensor is covered with a layer of black, which proves that your fuel is not fully burned and carbon deposits are still occurring. In addition to the exhaust pipe turning black, even the oxygen sensor next to it may be black and needs to be repaired in time.

In addition to looking at the color, you can also observe the conditions of the vehicle to make judgments, such as: engine fuel consumption and exhaust pollution increase, engine idling unstable, misfire, etc. It is recommended to troubleshoot or replace in time if the above conditions are found.

How to maintain the oxygen sensor?

Check the working status of the oxygen sensor every 30,000 kilometers. If it is aging or fails, clean or replace the oxygen sensor in time. Because the performance of the three-way catalytic device and the engine will be damaged due to the malfunction of the oxygen sensor, don’t lose too much.

Avoid collisions with hard objects, because the oxygen sensor has ceramic sensitive elements, which are hard and brittle. If it collides with a hard object, severe vibration or impact may damage the ceramic element or heating element in the oxygen sensor.

Do not pull the wire of the oxygen sensor excessively. Pulling the wire may cause the unreliable connection of the oxygen sensor, thereby affecting the operation of the oxygen sensor.

Do not flush the exhaust pipe casually. When the engine has just turned off, do not flush the exhaust pipe immediately. Because the exhaust pipe is rapidly cooled from the outside, it will cause the ceramic sensor of the oxygen sensor close to the exhaust pipe to burst and damage the oxygen sensor.

The oxygen sensor is a key accessory to ensure engine power output, fuel consumption and exhaust emissions! ! In order to improve fuel efficiency and reduce exhaust emissions, please pay more attention to the oxygen sensor to ensure safe driving.

If the oxygen sensor has been found to be faulty and needs to be replaced, please be sure to go to the repair shop for repair, because these require certain professional knowledge and tools to operate! Depending on the vehicle model, the position of the oxygen sensor is different, and the difficulty of replacing the oxygen sensor is different. It is generally recommended to do this by old drivers or some theoretical basis, otherwise operating errors may cause damage Oh.

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