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 DTCNOTE: 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.
Turn the ignition on.
With the scan tool, erase ECM DTCs.
Perform several engine run cycles, turning the ignition off for at least 10 seconds between run cycles.
With the scan tool, read ECM DTCs.
Did this DTC set again?
Yes
- Go To2
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2. ENGINE OIL PRESSURE SENSOR
Turn the ignition off.
Disconnect the Oil Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage of the Oil Pressure Sensor Signal circuit.
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).
No
- Go To3
3. OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the BCM harness connectors.
Measure the resistance between ground and the Oil Pressure Sensor Signal circuit.
Is the resistance above 1000 ohms?
Yes
- Go To4
No
- 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
Measure the resistance between Sensor Ground and the Oil Pressure Sensor Signal circuit.
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).
No
- 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).