P0453 CHEVROLET - Fuel Tank Pressure Sensor Circuit High Voltage
Tech notesOn most Chevrolet vehicles the sensor is on top of the fuel tank.
When is the code detected?An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
P0453 Chevrolet DescriptionThe fuel tank pressure sensor responds to changes in fuel tank pressure. Vacuum is consider negative pressure. The information supplied by the fuel tank pressure sensor to the Engine Control Module (ECM) is used in order to detect vacuum decay or an excessive vacuum during the EVAP diagnostic routine.
The fuel tank pressure sensor signal voltage to VCM varies from a minimum of about 0.1 volts with pressure in the fuel tnk to greater than 4.0 volts with high vacuum in fuel tank.