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Low Engine Oil Level 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.
Low Engine Oil Level Indicator Always On

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
  1. Install a scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. With a scan tool, observe one of the following engine oil level parameters:
    • Engine Oil Level Switch parameter in the PCM Engine Data 2 data list-3.4L.
    • Engine Oil Level Switch parameter in the ECM IPC Data, data list-3.6L.
Does the Engine Oil Level Switch parameter display OK?		 Go to Step 3  Go to Step 4 
3 Does the low engine oil level indicator remain illuminated after the displays test? Go to Step 10  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
4
  1. Turn the ignition OFF.
  2. Disconnect the engine control module (ECM)/Powertrain control module (PCM) connector C2.
  3. Turn the ignition ON, with the engine OFF.
  4. Connect a test lamp between the signal circuit of the engine oil level switch at the ECM/PCM and battery positive voltage. Refer to Circuit Testing in Wiring Systems.
Does the test lamp illuminate?		 Go to Step 7  Go to Step 5 
5 Test the signal circuit of the engine oil level indicator switch for an open, or for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 6 
6 Test the ground of the engine oil level indicator switch for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 8 
7 Inspect for poor connections at the ECM/PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 9 
8 Inspect for poor connections at the engine oil level switch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 12  Go to Step 11 
9
IMPORTANT: Program the replacement ECM/PCM.
Replace the ECM/PCM. Refer to Powertrain Control Module (PCM) Replacement in Engine Controls - 3.4L or Engine Control Module (ECM) Replacement in Engine Controls - 3.6L (LY7).Did you complete the replacement?		 Go to Step 12  -
10
IMPORTANT: Perform the compass calibration and variance procedure on the replacement IPC.
Replace the IPC. Refer to Instrument Panel Cluster (IPC) Replacement .Did you complete the replacement?		 Go to Step 12  -
11 Replace the engine oil level switch. Refer to Engine Oil Level Sensor and/or Switch Replacement in Engine Mechanical - 3.4L or Engine Oil Pressure Sensor and/or Switch Replacement in Engine Mechanical - 3.6L (LY7).
Did you complete the replacement?		 Go to Step 12  -
12 Operate the system in order to verify the repair.
Did you correct the condition?		 System OK Go to Step 2 
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