Engine Oil Pressure Indicator Always On. Chevrolet Malibu 2006

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2006 🢒 Malibu 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Engine Oil Pressure Indicator Always On

Engine Oil Pressure Indicator Always On 2.2L and 3.5L

Step	Action	Yes	No
Schematic Reference: Instrument Cluster Schematics
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Start the engine. Does the engine oil pressure indicator illuminate after the displays test?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections
3	Install a scan tool. With a scan tool, observe the Engine Oil Pressure Switch parameter in the instrument panel cluster (IPC) powertrain control module (PCM) Data list. Does the Engine Oil Pressure Switch parameter display OK?	Go to Step 10	Go to Step 4
4	Turn OFF the ignition. Disconnect the engine oil pressure switch. Start the engine. With the scan tool, observe the Engine Oil Pressure Switch parameter. Does the Engine Oil Pressure Switch parameter display OK?	Go to Step 6	Go to Step 5
5	Test the oil pressure switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition?	Go to Step 11	Go to Step 7
6	Inspect for poor connections at the harness connector of the engine oil pressure switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 11	Go to Step 8
7	Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 11	Go to Step 9
8	Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor and/or Switch Replacement for the 2.2L engine or Engine Oil Pressure Sensor and/or Switch Replacement for the 3.5L engine. Did you complete the replacement?	Go to Step 11	--
9	Replace the PCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Step 11	--
10	Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement?	Go to Step 11	--
11	Use the scan tool in order to clear the DTCs. Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2

Engine Oil Pressure Indicator Always On 3.9L

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle .

The instrument panel cluster (IPC) illuminates the engine oil pressure (EOP) indicator when the engine control module (ECM) detects a low oil pressure condition from the EOP sensor. The ECM sends a GMLAN message to the body control module (BCM) indicating a low engine oil pressure. The BCM sends a GMLAN message to the IPC requesting the IPC to illuminate the engine oil pressure indicator.

Reference Information

Schematic Reference

Instrument Cluster Schematics

Connector End View Reference

•	Instrument Panel, Gages, and Console Connector End Views

•	Engine Control Module Connector End Views for the 3.9L engine

•	Inline Harness Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Circuit/System Testing

Start the engine.

⇒	If the EOP indicator illuminates after the displays test, replace the IPC.

⇒	If the EOP indicator does not illuminate after the IPC displays test, check for a poor connection at the harness connector of the IPC.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification .

•	Engine Oil Pressure Sensor and/or Switch Replacement

•	Control Module References for IPC replacement, setup and programming