P0522-ENGINE OIL PRESSURE SENSOR CIRCUIT LOW

For a complete wiring diagram, refer to the Wiring Information.

When Monitored:
With the ignition on.
Set Condition:
The Powertrain Control Module (PCM) detects that the (G6) Oil Pressure Sensor Signal circuit is below 0.25 Volt for 0.5 second.

Possible Causes
(K188) OIL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT OPEN/HIGH RESISTANCE
(K188) OIL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K188) OIL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO THE (K915) OIL PRESSURE SENSOR GROUND CIRCUIT
(G6) OIL PRESSURE SENSOR SIGNAL CIRCUIT OPEN/HIGH RESISTANCE
(G6) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
(G6) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K915) OIL PRESSURE SENSOR GROUND CIRCUIT
OIL PRESSURE SENSOR (OPS)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

1. DTC IS ACTIVE

NOTE: If any Sensor Reference DTCs are present, perform the applicable diagnostic procedure before continuing with this test.

1.	Ignition on, engine not running.

2.	With the scan tool, clear DTCs in the PCM.

3.	Start the engine.

4.	Monitor the scan tool for at least two minutes.

5.	With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

Go To 2

Perform the INTERMITTENT DTC diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

2. CHECK THE (K188) OIL PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT VOLTAGE

1.	Turn the ignition off.

2.	Disconnect the Oil Pressure Sensor harness connector.

3.	Turn the ignition on.

4.	Measure the voltage of the (K188) Oil Pressure Sensor 5-Volt Supply circuit at the Oil Pressure Sensor harness connector.

Is the voltage above 4.8 Volts?

Yes

Go To 3

Repair the (K188) Oil Pressure Sensor 5-Volt Supply circuit for an open or short to ground.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

3. CHECK THE (G6) OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

1.	Turn the ignition off.

2.	Disconnect the PCM C1 harness connector.

3.	Measure the resistance between ground and the (G6) Oil Pressure Sensor Signal circuit at the Oil Pressure Sensor harness connector.

Is the resistance above 10k Ohms?

Yes

Go To 4

Repair the (G6) Oil Pressure Sensor Signal circuit for a short to ground.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

4. CHECK FOR THE (G6) OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (K915) OIL PRESSURE SENSOR GROUND CIRCUIT

1.	Measure the resistance between the (G6) Oil Pressure Sensor Signal circuit and the (K915) Oil Pressure Sensor Ground circuit at the Oil Pressure Sensor harness connector.

Is the resistance above 10K Ohms?

Yes

Go To 5

Repair the (G6) Oil Pressure Sensor Signal circuit for a short to the (K915) Oil Pressure Sensor Ground circuit.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

5. CHECK THE (G6) OIL PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN/HIGH RESISTANCE

1.	Measure the resistance of the (G6) Oil Pressure Sensor Signal circuit between the Oil Pressure Sensor harness connector and the PCM C1 harness connector.

Is the resistance below 5.0 Ohms?

Yes

Go To 6

Repair the (G6) Oil Pressure Sensor Signal circuit for an open or high resistance.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

6. OIL PRESSURE SENSOR

1.	Reconnect the Oil Pressure Sensor harness connector.

2.	Reconnect the PCM C1 harness connector.

3.	Turn the ignition on.

4.	With the scan tool, Clear DTCs.

5.	Turn the ignition off.

6.	Disconnect the Oil Pressure Sensor harness connector.

7.	Connect a jumper between the (G6) Oil Pressure Sensor Signal circuit and the (K188) Oil Pressure Sensor 5-Volt Supply circuit at the Oil Pressure Sensor harness connector.

8.	Turn the ignition on.

9.	With the scan tool, select View DTCs.

NOTE: The scan tool should display a P0523 Engine Oil Pressure Sensor High DTC as active or pending with the jumper in place.

Does the scan tool display the DTC as described above?

Yes

Replace the Oil Pressure Sensor in accordance with the service information.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

Go To 7

7. POWERTRAIN CONTROL MODULE

1.	Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oil Pressure Sensor and the Powertrain Control Module (PCM).

2.	Look for any chafed, pierced, pinched, or partially broken wires.

3.	Look for broken, bent, pushed out or corroded terminals.

4.	Perform any Technical Service Bulletins that may apply.

Were any problems found?

Yes

Repair as necessary.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

Replace the Powertrain Control Module in accordance with the service information.
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

P0522-ENGINE OIL PRESSURE SENSOR CIRCUIT LOW

Possible Causes