Boost Sensor Performance Check

Boost Sensor Performance Check

This check requires the scan tool to be connected, the engine running at curb idle rpm, and the transmission in Park.

At idle or at closed throttle decel, a properly functioning sensor will indicate a pressure reading about the same as barometric pressure. Sensor voltage (if any), should be low.

Sensor pressure readings should increase as throttle opening is increased. Voltage readings should also increase.

Boost pressure readings are opposite what you would read for vacuum. For example, as throttle opening increases, sensor pressure readings will also increase. Vacuum readings on the other hand, will decrease as throttle opening increases.