Sensor plug has oil
The main reason that the sensor plug has oil is that the oil from other parts leaks to the sensor. The sensor plug itself does not contain oil, usually due to leakage of oil, transmission fluid or other liquids .
The specific reasons and solutions are as follows:
oil pollution : If there is oil on the plug of the oxygen sensor, it may be due to the oil seepage of the ball cage of the shaft in the gearbox, and the oil is thrown out at high speed and attached to the surface of the sensor. In this case, it is necessary to replace the new oil in time.
engine oil leakage : There is oil on the rear oxygen sensor, usually due to engine oil leakage. It is necessary to check and repair the engine oil leakage problem to ensure the normal operation of the sensor .
cleaning and maintenance : If the filter screen in front of the sensor is blocked, it can be removed and cleaned. Oil pressure sensor leakage problem, should immediately go to a professional repair shop for replacement .
Preventive measures include regularly checking the vehicle's oil condition to ensure there is no leakage and timely replacement of aged and contaminated oil to avoid impact on sensors .
The position of the sensor plug varies depending on the type of sensor and the mounting position.
Water temperature sensor plug : usually located at the outlet of the engine cooling system, between the tank and the engine. The water temperature sensor plug needs to be handled carefully, usually using a flat-mouth screwdriver to lift the plug, and be careful not to damage the cable connector.
oil level sensor plug : usually located at the bottom of the tank, through a sliding rheostat or capacitor principle to measure the oil level, with the change of the oil level, the output current will change, this current value is reflected in the automobile instrument, converted into gasoline fuel level.
oxygen sensor plug : usually located before and after the ternary catalyst, replace or check the plug by removing the fixing screws and iron sheet.
Laville fuel gauge sensor plug : located on the engine side of the main oil line, the main function is to monitor the engine lubrication system oil supply pressure.
electronic oil pressure sensor plug : usually located at the back of the engine, next to the cylinder block, next to the oil filter seat, including thick film pressure sensor chip, signal processing circuit, housing, fixed circuit board device and lead, etc.
The exact location and installation of these sensors may vary from model to model and brand, so it is recommended to refer to the specific repair manual of the vehicle or consult a professional technician when replacing or inspecting the sensor.
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