P0520

P0520-OIL PRESSURE TOO LOW





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

- When Monitored:
Ignition on, engine not running.

- Set Condition:
The Powertrain Control Module (PCM) senses the oil pressure is out of the calibrated range. One Trip fault.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting 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

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test.

2. ENGINE OIL/ENGINE MECHANICAL
1. Turn the ignition off.
2. The following items should be considered before determining the cause of this DTC:
- ENGINE MECHANICAL TOLERANCES OUT OF SPECIFICATION
- ENGINE OIL PRESSURE OUT OF SPECIFICATION
- LOW ENGINE OIL
- DETERIORATED OR DIRTY OIL
- ENGINE OIL CONTAMINATED (i.e., coolant and/or fuel)

NOTE: Failure to do so may lead to misdiagnosis.

3. If any of the above conditions are found, repair as necessary

Were any of the above conditions present?

Yes

- Repair as necessary.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Go To 3

3. POWERTRAIN CONTROL MODULE (PCM)
1. Replace the Oil Pressure Sensor.
2. Turn the ignition on.
3. Using the scan tool, erase the DTCs.
4. Start the engine and allow it to reach normal operating temperature.
5. Using the scan tool, read the active DTCs.

Did the DTC return?

Yes

- Replace and program the Powertrain Control Module. Powertrain Control Module - Removal.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Repair complete.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.