GM Service Manual Online
For 1990-2009 cars only

Oil Pressure Gauge Inoperative

Step

Action

Value(s)

Yes

No

1

Were you sent here from the IPC Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, attempt to establish communications with the PCM.

Does the scan tool communicate with the PCM?

--

Go to Step 3

Go to Powertrain On Board Diagnostic (OBD) System Check

3

Select PCM display DTC function on the scan tool.

Does the scan tool display DTC P0522 or P0523?

--

Go to Powertrain On Board Diagnostic (OBD) System Check

Go to Step 4

4

With a scan tool, select IPC special functions and command a sweep test (minimum to maximum) on the oil pressure gauge.

Does the scan tool control the oil pressure gauge?

--

Go to Step 5

Go to Step 8

5

With a scan tool, observe the Oil Pressure parameter in the IPC data list.

Does the scan tool indicate the correct Oil Pressure?

--

Go to Step 6

Go to Step 7

6

With a scan tool, observe the Oil Pressure parameter in the IPC data list and the oil pressure gauge display on the IPC.

Does the scan tool display correspond with the oil pressure gauge display within the specified value?

15°C

(15°F)

System OK

Go to Step 8

7

With a scan tool, observe Engine Oil Pressure parameter in the PCM data list.

Does the scan tool indicate the correct Engine Oil Pressure?

--

Go to Step 8

Go to Powertrain On Board Diagnostic (OBD) System Check

8

Replace the IPC assembly. Refer to Instrument Cluster Replacement .

Did you complete the replacement?

--

Go to Step 9

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9

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2