Nissan Sentra B18 (2020-2025) Service Manual: P0524 Engine Oil Pressure

Dtc Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Decrease in engine oil pressure

• Decrease in engine oil level

• Engine oil condition

• EOP sensor

• Cause of engine oil consumption

FAIL-SAFE

Engine Control System

Idle Start/Stop System

Not applicable

Confirmation Procedure

CAUTION:

If DTC 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 10 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 Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   Proceed to DTC 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.

      Monitor item	Condition		Value (Approx.)
      EOP SENSOR	Engine oil temperature: 80°C (176°F) Selector lever: P or N position Air conditioner switch: OFF No load	Engine speed: Idle	1,450 mV or more
      		Engine speed: 2,000 rpm	2,850 mV or more

   Without CONSULT

   Check engine oil level. Refer to Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Proceed to DTC Diagnosis Procedure.

5. PERFORM DTC CONFIRMATION PROCEDURE

   1. Start the engine and warm it up to normal operating temperature.

   2. Maintain the following conditions for at least 10 consecutive seconds.

      Selector lever position	N or P position
      Engine coolant temperature	70°C (158°F) or more
      Engine speed	1,700 rpm or more

      Note:

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

   3. 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

1. CHECK ENGINE OIL LEVEL

   1. Turn ignition switch OFF.

   2. Check engine oil level. Refer to 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.

      Monitor item	Condition		Value (Approx.)
      EOP SENSOR	Engine oil temperature: 80°C (176°F) Selector lever: P or N position Air conditioner switch: OFF No load	Engine speed: Idle	1,450 mV or more
      		Engine speed: 2,000 rpm	2,850 mV or more

   Without CONSULT

   Check engine oil pressure. Refer to Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Check oil pump. Refer to Exploded View.

3. 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.

4. CHECK ENGINE OIL LEAKAGE

   Check engine oil leakage. Refer to Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Repair or replace malfunctioning part.

5. CHECK CAUSE OF ENGINE OIL CONSUMPTION

   Check the following item.

   Step	Inspection item	Equipment	Standard	Reference
   1	PCV valve	POSITIVE CRANKCASE VENTILATION : Periodic Maintenance
   2	Exhaust front tube	Visual	No blocking No abnormal sounds	—
   3	Oil pump ASSY	Visual	No blocking No abnormal sounds	—
   4	Piston Piston pin Piston ring	Piston to piston pin oil clearance Inspection Piston ring side clearance Inspection Piston ring end gap Inspection
   5	Cylinder block	Cylinder block top surface distortion Inspection Piston to cylinder bore clearance Inspection

   >>

   Repair or replace malfunctioning part.

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