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The fuel tank pressure sensor does all this by monitoring the pressure both positive and negative inside your fuel tank. 3 9 out of 5 stars 43. Fuel Tank Pressure Sensor For 01 08 Kia Rio Rio5 Spectra Sprectra5 The fuel tank pressure sensor is used to detect leaks as part of the evap or evapora…

The fuel tank pressure sensor is always monitoring the pressure in the fuel tank for potential leaks. I found this write up that seemed to explain it fairly well. The Chad Experience Nissan Altima P1491 Check Replace The Vacuum A vehicle fuel emissions system includes a fuel tank a tank pressur…