Barometric Pressure (BP) Sensor

Sensor measures barometric pressure of atmosphere. Variations in atmospheric pressure are converted to electrical signals and sent to ECA. The ECA uses this signal to adjust fuel mixture due to changes in altitude. The BP sensor affects air/fuel ratio and idle speed.

The sensor looks same as Manifold Absolute Pressure (MAP) sensor, except the tubing nipple on BP sensor is open to the atmosphere and the MAP sensor is connected to the intake manifold.