Manifold Pressure/Vacuum Sensor: Description and Operation

MANIFOLD DIFFERENTIAL PRESSURE (MDP) SENSOR
The MDP sensor converts the pressure of intake manifold caused by exhaust gas to voltage and input it to the ECM. The ECM judges the condition of the EGR by this signal EGR incoming. If there is abnormal condition, the engine warning light is turned on to notify the driver.

This is the pressure sensor that converts the pressure value into an electric signal and provides the signal to ECM. If the differential pressure is over -11 Hg. (in case of manual transmission ), -26 Hg. (in case of auto transmission ),the MDP sensor is expected to operate. If EGR valve does not then operate, there is a problem with the EGR valve.





The value of MDP (manifold differential pressure sensor) has the correlation with the pressure. Refer to the graph as shown in the illustration.

Vo = 0.06(P) + 4.760 P : Hg