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Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Barometric Pressure Sensor: Description and Operation

Fig. 43 Atmospheric Pressure (PA) Sensor And Voltage Output Chart:





The PA sensor converts atmospheric pressure into an electrical signal and inputs that signal to the ECU. This signal is used as a reference signal by the ECU, and uses the difference between the PA sensor and the MAP sensor to more accurately calculate engine load.