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Manifold Absolute Pressure (MAP) Sensor

MAP sensor, mounted on left side of cowl, monitors vacuum in the EGR system. It senses the actual vacuum in the EGR vacuum line and sends a signal to the control module.

The signal is compared to the EGR duty cycle calculated by the control module. If there is a minor difference in the vacuum value sensed and the control module command, the control module corrects. When a major difference is sensed, the control module recognizes a fault and sends a full EGR signal.

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