The MAP sensor performs ‘double duty’ as a barometric pressure sensor as soon as the key is turned on. ‘chip’) with a current running through it. ![]() ![]() Dividing the sensor vacuum and the vacuum from the intake manifold is a flexible silicon wafer (a.k.a. (On a forced-induction engine, the MAP sensor can be found on the intake tract before the turbo.) Inside the MAP sensor is a sealed chamber that either has a vacuum or a controlled pressure that is calibrated for the engine. The MAP sensor is typically located on the intake manifold, either next to or on the throttle body itself.
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