Engine Oil Pressure Indicator Always On

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Yes	No
Schematic Reference: Instrument Cluster Schematics
1	Did you perform the Diagnostic System Check - Instrument Cluster?	Go to Step 2	Go to Diagnostic System Check - Instrument Cluster
2	Start the engine. Does the engine oil pressure (EOP) indicator display in the message center?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Turn the ignition ON, with the engine OFF. Install a scan tool. With a scan tool, observe the Engine Oil Pressure Switch parameter in the PCM Engine Data 2 data list. Does the Engine Oil Pressure Switch parameter display Low?	Go to Step 4	Go to Step 7
4	Turn OFF the ignition. Disconnect the EOP indicator switch. Turn ON the ignition. Does the Engine Oil Pressure Switch parameter display OK?	Go to Step 8	Go to Step 5
5	Test for a short to ground in the signal circuit of the EOP indicator switch. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 9	Go to Step 6
6	IMPORTANT: Perform the programming procedure for the replacement powertrain control module (PCM). Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement in Engine Controls - 3.4L.Did you complete the replacement?	Go to Step 9	-
7	IMPORTANT: Perform the compass calibration and variance procedure on the replacement instrument panel cluster (IPC). Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement .Did you complete the replacement?	Go to Step 9	-
8	Replace the engine oil level switch. Refer to Engine Oil Level Sensor and/or Switch Replacement in Engine Mechanical - 3.4L. Did you complete the replacement?	Go to Step 9	-
9	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 3