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Home >> Oldsmobile >> 1995 >> Silhouette >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 3.8L >> Computerized Engine Controls >> Input Devices >> Camshaft Position Sensor

Camshaft Position Sensor

Camshaft position sensor, used on 3.8L engine, utilizes a Hall Effect switch mounted behind water pump. The sensor monitors camshaft position and sends signals to control module. These signals provide control module with a TDC position reference for No. 1 piston. This allows control module to compute camshaft position and RPM and fire fuel injectors sequentially. If camshaft position sensor signal is missing, control module will sequentially-fire fuel injectors based on last pulsed signal. This allows for a limp-home mode. For additional information, see FUEL CONTROL  under FUEL SYSTEM.

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