Engine Oil Pressure Indicator Always On. Cadillac Seville 2001

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2001 🢒 Seville 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Engine Oil Pressure Indicator Always On

Step	Action	Yes	No
Schematic Reference: Instrument Cluster Schematics
1	Did you perform the Instrument Cluster Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - Instrument Cluster
2	Start the engine. Observe the engine oil pressure indicator. Does the engine oil pressure indicator illuminate during the displays test and then turn OFF?	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems	Go to Step 3
3	Install a scan tool. Start the engine. With a scan tool, observe the Engine Oil Pressure Switch parameter in the powertrain control module (PCM) Engine Data 3 list. Does the Engine Oil Pressure Switch parameter indicate Low?	Go to Step 4	Go to Step 6
4	Turn the ignition OFF. Disconnect the engine oil pressure switch. Turn the ignition ON, with the engine OFF. With a scan tool, observe the Engine Oil Pressure Switch parameter in the PCM data list. Does the Engine Oil Pressure Switch parameter indicate Low?	Go to Step 5	Go to Step 8
5	Test the engine oil pressure switch signal circuit for a short to ground. 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 7
6	Inspect for poor connections at the harness connector of the IPC. 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
7	Inspect for poor connections at the harness connector of the 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 11
8	Inspect for poor connections at the harness connector of the engine oil pressure 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 10
9	Replace the IPC. Refer to Instrument Cluster Replacement . Did you complete the replacement?	Go to Step 12	--
10	Replace the engine oil pressure switch. Refer to Engine Oil Pressure Sensor or Switch Replacement . Did you complete the replacement?	Go to Step 12	--
11	Important: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls. 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