Let me tell you, there is an atmospheric pressure in the car data stream, 99Kpa to 102kpa altitude is different, the pressure is different, this data comes from the intake pressure sensor, when the engine does not start, the pressure of the intake branch pipe and the pressure of the atmosphere is the same, the engine converts the signal voltage into the atmospheric pressure, stored in the engine computer
Hello, they are generally installed on the intake pipe, and there are also installed on the intake manifold, and a few are connected to a vacuum pipe. The sensor you mentioned is basically synthesized in the car now. Different names, some called air flow, air pressure, air temperature and so on.