If CODE89 is displayed on the Chevrolet Avio dashboard, it means that the oil pressure sensor is broken and you need to go to a 4S shop to replace it.
The function of the oil pressure sensor is to detect the oil pressure and send an alarm signal when the pressure is insufficient. When the oil pressure is insufficient, the oil light on the instrument panel will illuminate or a fault display will appear.
1. The pressure sensor is a sensor that converts pressure into electrical signal output. The electrical test instrument in the pressure measuring instrument is usually called a pressure sensor.
2. The pressure sensor is generally composed of an elastic sensitive element and a displacement sensitive element (or strain gauge). The function of the elastic sensitive element is to cause the measured pressure to act on a certain area and convert it into displacement or strain, and then convert it into an electrical signal that is related to the pressure by the displacement sensitive element or strain gauge. Sometimes the functions of these two components are combined into one.
3. Pressure sensors are widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines, etc. Many industries.
Extended information:
Working principle of the oil pressure sensor:
The oil pressure sensor is installed on the main oil passage of the engine. When the engine is running, the pressure measuring device Detect the pressure of the engine oil, convert the pressure signal into an electrical signal and send it to the signal processing circuit. After voltage amplification and current amplification, the amplified pressure signal is connected to the oil pressure indicator through the signal line, and the two coils inside the oil pressure indicator are changed. The ratio of the current flowing through the motor indicates the engine oil pressure.
The pressure signal that has been amplified by voltage and current is also compared with the alarm voltage set in the alarm circuit. When it is lower than the alarm voltage, the alarm circuit outputs an alarm signal and passes through the alarm line point. Turn on the alarm light.
The wiring method of the electronic oil pressure sensor is exactly the same as that of the traditional mechanical sensor. It can replace the mechanical pressure sensor and be directly connected to the automobile oil pressure indicator and low-pressure alarm light to indicate the oil level of the diesel automobile engine. pressure and provide low pressure alarm signal.
Compared with traditional piezoresistive oil pressure sensors, electronic automotive oil pressure sensors have the advantages of no mechanical moving parts, high accuracy, high reliability, and long life, and are in line with the development of automotive electronics. Require.
Since the working environment of automobiles is very harsh and the requirements for sensors are very strict, in the design of electronic automobile oil force sensors, it is not only necessary to select pressure measurement devices that are resistant to high temperature, corrosion resistance, and high accuracy, but also Components with reliable performance and wide operating temperature range, and anti-interference measures need to be taken in the circuit to improve the reliability of the sensor.