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Nissan Sentra B18 (2020-2025) Service Manual: P0520 Eop Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0520

EOP SENSOR/SWITCH

(Engine oil pressure sensor/switch circuit)

Diagnosis condition

Engine running at idle

Signal (terminal)

Engine oil pressure sensor signal

Threshold

  • A voltage signal transmitted from the engine oil pressure sensor is lower than 0.3 V

  • A voltage signal transmitted from the engine oil pressure sensor is higher than 5.02 V

Diagnosis delay time

—

POSSIBLE CAUSE

  • Harness or connectors

    • EOP sensor circuit is open or shorted.

    • Sensor power supply 2 circuit is shorted.

  • EOP sensor

  • Each sensor, connected with sensor power supply 2 circuit

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

  1. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    >>

    GO TO 2.

  2. CHECK ENGINE OIL LEVEL

    Check engine oil level. Refer to Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Perform Inspection.

  3. PERFORM DTC CONFIRMATION PROCEDURE

    1. Start the engine and let it idle for 5 second.

    2. Check DTC.

    Is DTC detected?

    YES >>

    Proceed to DTC Diagnosis Procedure.

    NO-1 >>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    NO-2 >>

    Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK EOP SENSOR POWER SUPPLY CIRCUIT-1

    1. Turn ignition switch OFF.

    2. Disconnect engine oil pressure (EOP) sensor harness connector.

    3. Turn ignition switch ON.

    4. Check the voltage between EOP sensor harness connector terminals.

      EOP sensor

      Voltage

      (Approx.)

      Connector

      +

      −

      Terminal

      F2

      3

      1

      5 V

    Is the inspection result normal?

    YES >>

    GO TO 7.

    NO >>

    GO TO 2.

  2. CHECK EOP SENSOR POWER SUPPLY CIRCUIT-2

    Check the voltage between EOP sensor harness connector and ground.

    +

    −

    Voltage

    (Approx.)

    EOP sensor

    Connector

    Terminal

    F2

    3

    Ground

    5 V

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    GO TO 3.

  3. CHECK EOP SENSOR POWER SUPPLY CIRCUIT-3

    1. Turn ignition switch OFF.

    2. Disconnect ECM harness connector.

    3. Check the continuity between EOP sensor harness connector and ECM harness connector.

      EOP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F2

      3

      F24

      43

      Existed

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace malfunctioning part.

  4. CHECK SENSOR POWER SUPPLY 2 CIRCUIT

    Refer to Diagnosis Procedure.

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace malfunctioning part.

  5. CHECK EOP SENSOR GROUND CIRCUIT

    1. Turn ignition switch OFF.

    2. Disconnect ECM harness connector.

    3. Check the continuity between EOP sensor harness connector and ECM harness connector.

      EOP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F2

      1

      F24

      45

      Existed

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair or replace malfunctioning part.

  6. CHECK ECM GROUND CIRCUIT

    1. Check the continuity between ECM harness connector and ground.

      ECM

      —

      Continuity

      Connector

      Terminal

      F24

      5

      Ground

      Existed

      65

      F25

      69

      E16

      157

      159

      162

    2. Also check harness for short to power.

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Repair or replace malfunctioning part.

  7. CHECK EOP SENSOR INPUT SIGNAL CIRCUIT

    1. Turn ignition switch OFF.

    2. Disconnect ECM harness connector.

    3. Check the continuity between EOP sensor harness connector and ECM harness connector.

      EOP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F2

      2

      F24

      46

      Existed

    4. Also check harness for short to power.

    Is the inspection result normal?

    YES >>

    GO TO 8.

    NO >>

    Repair or replace malfunctioning part.

  8. CHECK EOP SENSOR

    Check EOP sensor. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace EOP sensor. Refer to Exploded View.

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