Boost Sensor
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2002 Saturn Vue, 2002 Pontiac Montana, 2002 Pontiac Aztek, 2002 Oldsmobile Silhouette, and 2002 Oldsmobile Bravada. However, it is still accessible from the selected car via links, so may be relevant.
Boost sensor monitors boost pressure and is used by PCM to open wastegate which limits pressure. At full load under wide open throttle, boost sensor indicates high pressure (high voltage). At closed throttle under deceleration, boost sensor indicates low pressure (low voltage).