Sable V6-3.0L VIN U (1999)
Fuel Tank Pressure Sensor: Description and Operation
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For non- Onboard Refueling Vapor Recovery (ORVR) equipped vehicles, the fuel tank pressure sensor is located in the upper surface of the fuel
tank in contact with the vapor space.
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For ORVR equipped vehicles, the fuel tank pressure sensor is located inline and serviced as a fuel vapor control valve assembly.
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It monitors pressure and vacuum inside the fuel tank and communicates this information to the Powertrain Control Module (PCM).
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The fuel tank pressure sensor monitors vacuum level inside the tank during the OBD II leak test of the evaporative emission system.
