P0520-OIL PRESS SENSOR CKT MALF SIGNAL VOLTAGE TOO LOW

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the engine running.
Set Condition:
The Oil Pressure Sensor signal is below 0.19 volt for 0.5 seconds.

Possible Causes

ENGINE OIL PRESSURE SENSOR

BCM - OIL PRESSURE SENSOR SIGNAL SHORT TO GROUND

OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR GROUND

INTERMITTENT CONDITION

Diagnostic Test

1.CHECK FOR CURRENT DTC

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

Did this DTC set again?

Yes

Go To2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.ENGINE OIL PRESSURE SENSOR

Is the voltage between 4.7 and 5.3 volts?

Yes

Replace the Engine Oil Pressure Sensor.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Go To3

3.OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND

Is the resistance above 1000 ohms?

Yes

Go To4

Repair the Oil Pressure Sensor Signal circuit for a short to ground.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

4.OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO SENSOR GROUND

Is the resistance above 1000 ohms?

Yes

Replace and program the Body Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Repair the Oil Pressure Sensor Signal circuit for a short to Sensor Ground.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).