P0522-OIL PRESSURE TOO LOW

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

When Monitored:
With the ignition key on and battery voltage above 10.4 volts.
Set Condition:
The oil pressure sensor voltage at Powertrain Control Module (PCM) goes below the minimum acceptable value. One Trip Fault. Three good trips to turn off the MIL.

Possible Causes
(G6) OIL PRESSURE SIGNAL CIRCUIT OPEN
(G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE
(G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND
OIL PRESSURE SWITCH
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. ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)

NOTE: Make sure that the engine oil is at the proper level. Also, review the customers oil change history to ensure that the oil is being changed at the correct intervals and that the proper oil viscosity is being used.

1.	Start the engine and allow it to reach normal operating temperature.

WARNING:

When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

2.	Using the scan tool, read the active DTCs.

Is the DTC Active at this time?

Yes

Go To 2

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

2. OIL PRESSURE SWITCH

1.	Turn the ignition off.

2.	Disconnect the Oil Pressure Switch harness connector.

3.	Ignition on, engine not running.

4.	Connect a jumper wire to the (G6) Oil Pressure Signal circuit in the Sensor harness connector.

5.	With the scan tool monitor the Oil Pressure Switch state.

6.	Connect a jumper wire between the (K900) Sensor Ground circuit and the (G6) Engine Oil Pressure Signal circuit.

NOTE: Engine Oil Pressure voltage should change from approximately 4.5 volts to less than 0.5 volt.

Is the voltage reading within the listed specification when the jumper wire is installed?

Yes

Verify that there is good pin to terminal contact in the Switch and Powertrain Control Module connectors. Replace the Oil Pressure Switch if no problems were found in the connector. (Refer to 09 - Engine/Lubrication/SENSOR, Oil Pressure - Removal) .
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

Go To 3

NOTE: Remove the jumper wire before continuing.

3. (G6) OIL PRESSURE SIGNAL CIRCUIT SHORTED TO VOLTAGE

1.	Turn the ignition off.

2.	Disconnect the PCM C2 harness connector.

3.	Ignition on, engine not running.

4.	Measure the voltage on the (G6) Oil Pressure Signal circuit in the Switch harness connector.

Is there any voltage present?

Yes

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

Go To 4

4. (G6) OIL PRESSURE SWITCH SIGNAL CIRCUIT OPEN

1.	Measure the resistance of the (G6) Oil Pressure Signal circuit from the Oil Pressure Switch harness connector to the PCM C2 harness connector.

Is the resistance below 5.0 Ohms?

Yes

Go To 5

Repair the open in the (G6) Oil Pressure Signal circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

5. (G6) SIGNAL CIRCUIT SHORTED TO GROUND

1.	Measure the resistance between a known good ground and the (G6) Oil Pressure Signal circuit in the Switch connector.

Is the resistance below 100 Ohms?

Yes

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

Go To 6

6. POWERTRAIN CONTROL MODULE (PCM)

1.	Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Engine Oil Pressure Switch 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. Verify that there is good pin to terminal contact in the Switch and Powertrain Control Module connectors.

4.	Perform any Technical Service Bulletins that may apply.

Were there any problems found?

Yes

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

Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. (Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Powertrain Control - Removal) .
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

P0522-OIL PRESSURE TOO LOW

Possible Causes