Schematic Reference: Instrument Cluster Schematics , Engine Controls Schematics for the 2.4L engine, Engine Controls Schematics for the 3.5L engine or Engine Controls Schematics for the 3.9L engine

Connector End View Reference: Instrument Panel, Gages, and Console Connector End Views , Engine Control Module Connector End Views for the 2.4L engine, Powertrain Control Module Connector End Views for the 3.5L engine or Powertrain Control Module Connector End Views for the 3.9L engine

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

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

1. Install a scan tool.
2. With a scan tool, observe the Engine Oil Pressure Switch parameter in the instrument panel cluster (IPC) powertrain control module (PCM) or the engine control module (ECM) Data list.

Does the Engine Oil Pressure Switch parameter display OK?

Go to Step 10

Go to Step 4

1. Turn OFF the ignition.
2. Disconnect the engine oil pressure switch.
3. Start the engine.
4. 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

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

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

Inspect for poor connections at the harness connector of the PCM/ECM. 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

Replace the engine oil pressure switch. Refer to

Did you complete the replacement?

Go to Step 11

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Replace the PCM/ECM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 11

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Replace the IPC. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 11

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1. Use the scan tool in order to clear the DTCs.
2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2