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Nissan Sentra Service Manual: P0524 Engine oil pressure

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P0524 Engine oil pressure

DTC Logic

DTC DETECTION LOGIC

DTC No.

 CONSULT screen terms (Trouble diagnosis content)

 DTC detecting condition

 Possible cause
P0524 ENGINE OIL PRESSURE (Engine oil pressure too low) An EOP sensor signal voltage applied to ECM remains lower than the specified value continuously for 10 seconds or more when the engine speed is 1,000 rpm ore more.
  • Decrease in engine oil pressure
  • Decrease in engine oil level
  • Engine oil condition
  • EOP sensor
  • Engine body

DTC CONFIRMATION PROCEDURE

CAUTION:

If “Diagnosis Procedure” is unfinished, be sure to perform Step 3 and 4.

1.PRECONDITIONING-1

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

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Turn ignition switch ON.
  3. Turn ignition switch OFF and wait at least 10 seconds.

TEST CONDITION:

Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

>> GO TO 2.

2.PRECONDITIONING-2

Is “Diagnosis Procedure” of DTC P0524 finished? YES >> GO TO 5.

NO >> GO TO 3.

3.CHECK ENGINE OIL LEVEL

Check engine oil level. Refer to LU-7, "Inspection".

Is the inspection result normal? YES >> GO TO 4.

NO >> Proceed to EC-344, "Diagnosis Procedure".

4.CHECK ENGINE OIL PRESSURE

With CONSULT


  1. Turn ignition switch ON.
  2. Select “DATA MONITOR” mode of “ENGINE” using CONSULT
  3. Start the engine and check that “EOP SENSOR” changes, according to engine speeds.

Without CONSULT


Check engine oil pressure. Refer to LU-7, "Inspection". Without CONSULT


Check engine oil pressure. Refer to LU-7, "Inspection".

Is the inspection result normal? YES >> GO TO 5.

NO >> Proceed to EC-344, "Diagnosis Procedure".

5.PERFORM DTC CONFIRMATION PROCEDURE

  1. Start engine and warm it up to normal operating temperature.
  2. Maintain the following conditions for about 10 consecutive seconds.

NOTE:


NOTE:

With engine speed set around 4,000 rpm, the phenomenon can be reproduced more easily.

  1. Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-344, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK ENGINE OIL LEVEL

  1. Turn ignition switch OFF.
  2. Check engine oil level. Refer to LU-7, "Inspection".

Is the inspection result normal? YES >> GO TO 2.

NO >> GO TO 4.

2.CHECK ENGINE OIL PRESSURE

With CONSULT


  1. Turn ignition switch ON.
  2. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
  3. Start the engine and check that “EOP SENSOR” changes, according to engine speeds.

Without CONSULT


Check engine oil pressure. Refer to LU-7, "Inspection". Without CONSULT


Check engine oil pressure. Refer to LU-7, "Inspection".

Is the inspection result normal? YES >> GO TO 3.

NO >> Check oil pump. Refer to LU-15, "Removal and Installation".

3.CHECK EOP SENSOR

Check EOP sensor. Refer to EC-342, "Component Inspection (EOP Sensor)".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Repair or replace error-detected parts.

4.CHECK ENGINE OIL LEAKAGE

Check engine oil leakage. Refer to LU-7, "Inspection".

Is the inspection result normal? YES >> GO TO 5.

NO >> Repair or replace error-detected parts.

5.CHECK CAUSE OF ENGINE OIL CONSUMPTION

Check the following item.

>> Repair or replace error-detected parts.


>> Repair or replace error-detected parts.

Component Inspection (EOP Sensor)

1.CHECK EOP SENSOR

  1. Turn ignition switch OFF.
  2. Disconnect EOP sensor harness connector
  3. Check the resistance between EOP sensor connector terminals.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> Replace EOP sensor. Refer to EM-94, "Exploded View".

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Precaution for Work
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