Compared with the traditional piezoresistive oil pressure sensor the electronic automobile oil pressure sensor has the advantages of no mechanical moving parts (i.e. no contact) high precision high reliability long life and so on and meets the requirements of automobile electronic development. Because car work environment is very bad very strict to the requirement of the sensor in the design of electronic automobile engine oil pressure sensors not only need to select high temperature resistance corrosion resistance high accuracy pressure measurement device choose reliable performance wide working temperature range of the components but also need to take anti-interference measures in the circuit in order to improve the reliability of the sensor.