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Home >> Mercury >> 1998 >> Grand Marquis GS >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation 4.6L >> Computerized Engine Controls >> Input Devices >> Power Steering Pressure (PSP) Sensor
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Power Steering Pressure (PSP) Sensor

The PSP sensor monitors power steering pressure. When power steering fluid pressure exceeds the preset limit, the PSP sensor sends an input signal to the PCM. The PCM then adjusts idle speed. PCM also uses PSP signal to adjust transmission Electronic Pressure Control (EPC) pressure during increased engine load.

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