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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 880 (Instrument Panel, Gages, And Console) >> Diagnostic Information and Procedures >> DTC P1189: Engine Oil Pressure Switch Signal Circuit Is Low >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

With low oil pressure, the engine oil pressure (EOP) switch closes, and the signal circuit is low. With oil pressure in the normal range, the engine oil pressure switch opens, and the signal circuit is high. The PCM monitors the engine oil pressure switch signal circuit and sends a class 2 message to the IPC indicating the switch status.

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