How to eliminate the common failures oxygen sensor

Once the oxygen sensor failure, will make the electronic fuel injection system of the computer can't get oxygen concentration in the exhaust pipe of information, so can't feedback control of air-fuel ratio, can make the engine fuel consumption and exhaust pollution increase, engine, unstable idle speed of fault phenomena, the surge of fire. Therefore, must be timely troubleshooting or replacement.

1, the oxygen sensor poisoning: oxygen sensor poisoning is frequent and difficult to prevention and control of a fault, especially often use leaded gasoline cars, even if is a new oxygen sensor, can only work for thousands of kilometers. If only a slight lead poisoning, and then use a case of leaded gasoline, can remove the lead on the surface of the oxygen sensor, make its restore normal work. But often because of too high exhaust temperature, and make the lead into the interior, hindered the diffusion of oxygen ions, the oxygen sensor failure, then can only be replaced.

in addition, the oxygen sensor silicone poisoning are also common. In general, after burning gasoline and lubricating oil containing silicon compounds generated silica, silicone rubber sealing washer, improper use of organic silicon gas can make oxygen sensor failure, and therefore to use good quality fuel oil and lubricating oil. When repairs to correctly choose and install rubber gasket, do not use outside coating factory regulations on sensor of solvents and adhesion agent, etc.

2, carbon deposition, because of bad engine combustion in oxygen sensor surface carbon, and oxygen sensor inside into the grease or dust, sediment, impede or block the outside air into the oxygen sensor, the oxygen sensor output signal phrase, ECU can't correct air-fuel ratio in a timely manner. Produce carbon deposition, main show is rising oil consumption, emission concentration increased significantly. At this point, if the sediment removal, will return to normal work.

3, oxygen sensor ceramic fracture: oxygen sensor ceramic hard and brittle, rap or with strong airflow purging, with good thing could make its disintegration and failure. Therefore, to be very careful when processing, found that the problem timely replacement.

4, heater resistance wire burn out: for heating type oxygen sensor, if the heater resistance wire ablation, it is difficult to make the sensor not work at the normal operating temperature. Replace the heater resistance wire.

5, oxygen sensor internal wiring break off: internal wiring.

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