Pinpoint Test X : The Low Oil Pressure Warning Indicator Is Never Or Always On: Notes

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Instrument Cluster for schematic and connector information.

Normal Operation and Fault Conditions

See Low Oil Pressure Warning Indicator. REFER to: INSTRUMENT PANEL CLUSTER (IPC) - SYSTEM OPERATION AND COMPONENT DESCRIPTION

NOTE: If DTC U0100:00 sets in the IPC, other observable symptoms can be an inoperative speedometer, tachometer, temperature gauge or odometer.

If the IPC fails to receive the oil pressure warning message from the BCM for less than 2 seconds, the IPC defaults the low oil pressure warning indicator to the last state (on or off), based upon the last known good oil pressure status message.

If the BCM fails to receive the oil pressure warning message from the PCM for 2 seconds or longer, the BCM and the IPC sets DTC U0100:00 and the IPC defaults the low oil pressure warning indicator on.

Possible Sources

Wiring, terminals or connectors
Engine oil pressure switch
Base engine oil pressure concern
PCM
IPC

Visual Inspection and Diagnostic Pre-checks

Inspect the engine for noise that can indicate a base engine or low engine oil pressure concern. Inspect the engine oil pressure switch for signs of external damage. Inspect the engine oil pressure switch connector for signs of corrosion and inspect the harness for damage indicating an open or short to ground.