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For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1999 🢒 Aurora 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 ENGINE OIL PRESSURE Message Inoperative

ENGINE OIL PRESSURE Message Inoperative Buick

Step

Action

Value(s)

Yes

No

1

Perform the Instrument Cluster System Check.

Is the system check complete?

--

Go to Step 2

Go to Instrument Cluster System Check

2
  1. Turn the ignition switch to RUN.
  2. Use the scan tool IPC function in order to read the diagnostic trouble codes.

Does the scan tool display DTC 1091?

--

Go to Step 5

Go to Step 3

3
  1. Turn the ignition switch to OFF.
  2. Disconnect the oil pressure sensor.
  3. Connect 2 RED leads from J 33431-C tester to terminal A (TAN/BLK) to terminal B (BLK)
  4. Turn the ignition switch to RUN.
  5. Use the scan tool IPC data list. Select "oil pressure".
  6. Set the tester resistance to 0 ohms (0 PSI)

Is the scan tool display less than the specified value?

2 PSI

Go to Step 4

Go to Step 10

4
  1. Turn the ignition switch to OFF.
  2. Disconnect the oil pressure sensor.
  3. Connect 2 RED leads from J 33431-C tester to terminal A (TAN/BLK) to terminal B (BLK)
  4. Turn the ignition switch to RUN.
  5. Use the scan tool IPC data list. Select "oil pressure".
  6. Set the tester resistance to open circuit

Is the scan tool display within the specified range?

2-6 PSI

Go to Step 12

Go to Step 10

5
  1. Turn the ignition switch to OFF
  2. Disconnect the oil pressure sensor/switch connector.
  3. Connect a fused jumper from the oil pressure sensor/switch harness connector terminal A (TAN) to ground.
  4. Turn the ignition switch to RUN.

Does the low oil pressure indicator light?

--

Go to Step 8

Go to Step 6

6

Inspect CKT 231 (TAN/BLK) for an open.

Is the circuit OK?

--

Go to Step 7

Go to Step 13

7

Inspect for proper terminal contact at the following terminals:

  1. The in-line connector C101 terminal E5.
  2. The instrument cluster connector C2 terminal A2.

Are the contacts OK?

--

Go to Step 14

--

8

Inspect CKT 651 (BLK) for an open.

Is the circuit OK?

--

Go to Step 9

Go to Step 13

9

Inspect for proper terminal contact at the following terminals:

  1. The in-line connector C101 terminal C4.
  2. The oil pressure sensor/switch connector terminal A and terminal B.

Are the contacts OK?

--

Go to Step 15

--

10
  1. Inspect CKT 231 (TAN/BLK) for a short to ground or an open.
  2. Inspect CKT 651 (BLK) for an open or high resistance.

Are the circuits OK?

--

Go to Step 11

Go to Step 13

11

Inspect for proper terminal contact at the following terminals:

  1. The in-line connector C101 terminal C4 and terminal E5.
  2. The instrument cluster connector C2 terminal A2 and connector 1 terminal F16.

Are the contacts OK?

--

Go to Step 14

--

12

Inspect for proper terminal contact at the oil pressure sensor/switch connector terminal A and terminal B.

Are the contacts OK?

--

Go to Step 14

--

13

Repair the wiring.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

14

Replace the instrument cluster.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

15

Replace the oil pressure sensor/switch. Refer to Engine Controls.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

ENGINE OIL PRESSURE Message Inoperative Oldsmobile

Step

Action

Value(s)

Yes

No

1

Perform the Instrument Cluster System Check.

Is the system check complete?

--

Go to Step 2

Go to Instrument Cluster System Check

2
  1. Turn the ignition switch to RUN.
  2. Use the scan tool IPC function in order to read the diagnostic trouble codes.

Does the scan tool display DTC 1091?

--

Go to Step 5

Go to Step 3

3
  1. Turn the ignition switch to OFF.
  2. Disconnect the oil pressure sensor.
  3. Connect 2 RED leads from J 33431-C tester to terminal A (TAN/BLK) to terminal B (BLK)
  4. Turn the ignition switch to RUN.
  5. Use the scan tool IPC data list. Select "oil pressure".
  6. Set the tester resistance to 0 ohms (0 PSI).

Does the scan tool display match the specified values?

0 PSI

Go to Step 4

Go to Step 10

4
  1. Turn the ignition switch to OFF.
  2. Disconnect the oil pressure sensor.
  3. Connect 2 RED leads from J 33431-C tester to terminal A (TAN/BLK) to terminal B (BLK)
  4. Turn the ignition switch to RUN.
  5. Use the scan tool IPC data list. Select "oil pressure".
  6. Set the tester resistance to 85 ohms (120 PSI)

Does the scan tool display match the specified values?

120 PSI

Go to Step 12

Go to Step 10

5
  1. Turn the ignition switch to OFF
  2. Disconnect the oil pressure sensor/switch connector.
  3. Connect a fused jumper from the oil pressure sensor/switch harness connector terminal A (TAN) to ground.
  4. Turn the ignition switch to RUN.

Does the low oil pressure indicator light?

--

Go to Step 8

Go to Step 6

6

Inspect CKT 231 (TAN/BLK) for an open.

Is the circuit OK?

--

Go to Step 7

Go to Step 13

7

Inspect for proper terminal contact at the following terminals:

  1. The in-line connector C101 terminal F2.
  2. The instrument cluster connector C1 terminal C3.

Are the contacts OK?

--

Go to Step 14

--

8

Inspect CKT 651 (BLK) for an open.

Is the circuit OK?

--

Go to Step 9

Go to Step 13

9

Inspect for proper terminal contact at the following terminals:

  1. The in-line connector C101 terminal A7.
  2. The oil pressure sensor/switch connector terminal A and terminal B.

Are the contacts OK?

--

Go to Step 15

--

10
  1. Inspect CKT 231 (TAN/BLK) for a short to ground or an open.
  2. Inspect CKT 651 (BLK) for an open or high resistance.

Are the circuits OK?

--

Go to Step 11

Go to Step 13

11

Inspect for proper terminal contact at the following terminals:

  1. The in-line connector C101 terminal A7 and terminal F2.
  2. The instrument cluster connector C1 terminal C3 and terminal C13.

Are the contacts OK?

--

Go to Step 14

--

12

Inspect for proper terminal contact at the oil pressure sensor/switch connector terminal A and terminal B.

Are the contacts OK?

--

Go to Step 15

--

13

Repair the wiring.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

14

Replace the instrument cluster.

Is the repair complete?

--

Go to Instrument Cluster System Check

--

15

Replace the oil pressure sensor/switch. Refer to Engine Controls.

Is the repair complete?

--

Go to Instrument Cluster System Check

--