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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Instrument Panel System Displays, Gauges And Console) >> Diagnostic Information and Procedures >> DTC P0520 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

When the oil pressure is above 4.5 psi, the engine oil pressure switch opens, and the powertrain control module (PCM) senses a high signal voltage. The PCM monitors the oil pressure switch signal circuit and sends a class 2 message to the instrument panel cluster (IPC) indicating the switch status. When the engine oil pressure is low, the engine oil pressure switch closes, and the signal circuit is low.

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