P0522

P0522 - Engine Oil Pressure Sensor Circuit Low






For wiring diagrams, refer to.

• When Monitored: With the ignition on and battery voltage greater than 10.4 volts.

• Set Condition: The PCM detects that the oil pressure sensor input voltage is less than the minimum acceptable value.






• Always perform the pre-diagnostic troubleshooting procedure before proceeding. Refer to => Non-DTC Based Diagnostics. Pre-Diagnostic Troubleshooting Procedure

Test Step 1 - DTC is Active

• Turn the ignition ON.

• With the scan tool, select view DTCs and review the DTC environmental information.

Is the good trip counter greater than 0?

Yes

• The DTC is not active at this time. Refer to the checking for an intermittent DTC diagnostic procedure. Refer to => Non-DTC Based Diagnostics. Checking for an Intermittent DTC

No

• Go to Test Step 2 => [ Test
Step 2 - Oil Pressure Signal Circuit Shorted to Ground ]

Test Step 2 - Oil Pressure Signal Circuit Shorted to Ground






• Turn the ignition OFF.

• Disconnect the oil pressure sensor connector.

• Disconnect the PCM connector.

• Measure the resistance between ground and the oil pressure signal circuit in the oil pressure sensor harness connector.

Is the resistance more than 100 ohms?

Yes

• Go to Test Step 3 => [ Test
Step 3 - Oil Pressure Signal Circuit Open Circuit or High Resistance ]

No

• Repair the oil pressure signal circuit for a short to ground.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test

Test Step 3 - Oil Pressure Signal Circuit Open Circuit or High Resistance







Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals, resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.

• Measure the resistance of the oil pressure signal circuit between the oil pressure sensor harness connector and the appropriate terminal of special tool #8815.

Is the resistance less than 5.0 ohms?

Yes

• Go to Test Step 4 => [ Test
Step 4 - Oil Pressure Sensor ]

No

• Repair the oil pressure signal circuit for an open or high resistance.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test

Test Step 4 - Oil Pressure Sensor

• Turn the ignition OFF.

• Connect the PCM connector.

• Turn the ignition ON.

• With the scan tool, read the oil pressure sensor signal voltage.

• The sensor voltage should be approximately 5.0 volts (plus or minus.1 volt) with the connector disconnected.

Does the scan tool display the voltage as described more than?

Yes

• Replace the oil pressure sensor.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test

No

• Go to Test Step 5 => [ Test
Step 5 - PCM ]

Test Step 5 - PCM

• Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the oil pressure sensor and the PCM.

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

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

• Monitor the scan tool data relative to this circuit and wiggle test the wiring and connectors.

• Look for the data to change or for the DTC to reset during the wiggle test.

• Refer to any technical service bulletins that may apply.

Were any problems found?

Yes

• Repair as necessary.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test

No

• Replace and program the PCM.

• Perform the PCM Verification Test. Refer to => Non-DTC
Based Diagnostics. PCM Verification Test