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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Low Engine Oil Level Indicator Always On >> Circuit/System Description

Circuit/System Description

The engine oil level switch is a normally closed switch that opens when there is a low engine oil condition. When the switch is open the engine control module (ECM)/powertrain control module (PCM) will detect a high signal voltage input. During a low engine oil condition the ECM/PCM sends a serial data message to the instrument panel cluster (IPC) requesting illumination of the LOW OIL LEVEL message in the IPC.

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