Nissan Sentra B18 (2020-2025) Service Manual: P0087 Frp Control System

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P0087 Frp Control System

Dtc Description

DTC Description

DTC DETECTION LOGIC

Note:

DTC P0087 may be displayed when running out of gas.

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0087	LOW FUEL PRES (Fuel rail/system pressure - too low)	Diagnosis condition	Engine running at idle
		Signal (terminal)	Fuel rail pressure signal
		Threshold	Fuel rail pressure does not reach 4.0 MPa (40.8 kg/cm2, 580 psi) at engine cold start [water temperature −12°C (10.4°F) – 40°C (104°F)]. Fuel rail pressure remains at 7.5 MPa (76.5 kg/cm2, 1087.5 psi) or less for 1 second or more during engine idle condition after cold start [water temperature −12°C (10.4°F) – 40°C (104°F)]. The following condition continues for 5 seconds or more after engine start (regardless of water temperature): Target fuel pressure – Actual fuel pressure = 2.7 MPa (27.5 kg/cm2, 392 psi) or less.
		Diagnosis delay time	5 seconds or more

POSSIBLE CAUSE

Fuel system
Leakage in fuel line
High pressure fuel pump
Low pressure fuel pump
Damage in lifter
Out of gas
Harness or connector
Fuel Pressure sensor
Fuel Injector stuck open
Crogged in fuel line
High Pressure fuel pump cam and lifter

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode
Fail safe mode		Nissan Sentra Vehicle behavior
Traveling control mode	Accelerator angle variation control	ECM controls the accelerator pedal depression speed to make it slower than actual speed. This causes a drop in accelerating performance and encourages the driver to repair malfunction. Note: ECM does not control the accelerator pedal releasing speed.
Device fix mode		This mode fixes the electric IVT motor and the EVT control solenoid valve in the reference position. The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
Combustion control mode	Stratified charge combustion control at starting	No stratified charge combustion at starting (cold start).

Idle Start/Stop System

When a DTC is detected, the start/stop indicator lamp blinks slowly and the idle start/stop system operation is prohibited.

When ECM detects error while operating the idle start/stop system, ECM restarts the engine.

Confirmation Procedure

Confirmation Procedure

CHECK DTC PRIORITY

If the following DTCs are detected together with P0087, prioritize the service for each DTC in the following order.

Priority	DTC	Cause
1	P0090, P0091, P0092	High pressure fuel pump, Harness, Fuse, Relay
	P0190, P0191, P0192, P0193, P119C, P119D, P119E	Fuel pressure sensor, Harness
	P020x (x: Cyl No.), P0262, P0265, P0268, P0271, P0274, P0277	Injector, Harness
	P025A, P025B, P025C, P025D	Low Pressure fuel pump
	P0461, P0462	Fuel gage, Harness
	P062B, P026D	ECM, Harness
2	P119A, P119B	Fuel pressure sensor
3	P1197	Fuel run out

Note:

Depending on the Nissan Sentra vehicle,there may be cases where the mentioned DTC codes are not detected.

Is applicable DTC detected?

YES >>

Perform the diagnosis of the applicable. Refer to DTC Index .

NO >>

GO TO 2.

CHECK FUEL LEAKAGE
1. Turn ignition switch ON.
2. Visually check the piping between low pressure fuel pump and fuel injectors for fuel leakage.
3. Start the engine.
4. Visually check the piping between low pressure fuel pump and fuel injectors for fuel leakage.
Is inspection result normal?
YES >>
GO TO 3.
NO >>
Repair or replace error-detected parts.
PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

TESTING CONDITION:
- Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
- Before performing the following procedure, check that the fuel tank is 1/8 full of fuel.
>>
GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

Turn ignition switch ON.
Select “COOLANT TEMP/S” in “DATA MONITOR” mode of “ENGNE” using CONSULT.

Check the following condition;

COOLANT TEMP/S

: 5 – 40°C (41 – 104°F)

With GST

Follow the above steps for “With CONSULT”.

Is the condition satisfied?

YES >>

GO TO 5.

NO >>

Satisfy the condition.
Retry from step 2.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT
1. Start the engine and let it idle for 10 seconds.
2. Check 1st trip DTC.
With GST

Follow the above steps for “With CONSULT”.

Is 1st trip DTC detected?
YES >>
Proceed to DTC Diagnosis Procedure.
NO >>
GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE-3

With CONSULT

Select “COOLANT TEMP/S” in “DATA MONITOR” mode of “ENGINE” using CONSULT.

Maintain the following condition for 10 seconds or more at idle.

COOLANT TEMP/S

: 70°C (104°F) or more

Check 1st trip DTC.

With GST

Follow the above steps for “With CONSULT”.

Is 1st trip 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

CHECK DTC PRIORITY

If the following DTCs are detected together with P0087, prioritize the service for each DTC in the following order.

Priority	DTC	Cause
1	P0090, P0091, P0092	High pressure fuel pump, Harness, Fuse, Relay
	P0190, P0191, P0192, P0193, P119C, P119D, P119E	Fuel pressure sensor, Harness
	P020x (x: Cyl No.), P0262, P0265, P0268, P0271, P0274, P0277	Injector, Harness
	P025A, P025B, P025C, P025D	Low Pressure fuel pump
	P0461, P0462	Fuel gage, Harness
	P062B, P026D	ECM, Harness
2	P119A, P119B	Fuel pressure sensor
3	P1197	Fuel run out

Note:

Depending on the Nissan Sentra vehicle,there may be cases where the mentioned DTC codes are not detected.

Is applicable DTC detected?

YES >>

Perform the diagnosis of the applicable. Refer to DTC Index.

NO >>

GO TO 2.

CHECK FUEL LEVEL

Check that the fuel level is enough.

Is there 1/8 or more fuel?
YES >>
GO TO 4.
NO >>
GO TO 3.
REFUEL THE Nissan Sentra Vehicle
1. Refuel to over 1/8 of full.
2. Start the engine and keep the engine speed at 3,000 rpm for 30 seconds.
  Note:
  For best results, warm up the engine until “COOLAN TEMP/S” on “DATA MONITOR” mode of “ENGINE” reaches at least 70°C (158°F).
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Turn ignition switch ON.
7. Erase the DTC.
8. Start the engine and let it idle at least 60 seconds.
9. Perform DTC confirmation procedure again. Refer to DTC Description.
Is DTC P0087 detected?
YES >>
GO TO 4.
NO >>
INSPECTION END
AIR BLEED THE FUEL LINE
1. Start the engine, and let the engine run at idle at least for 10 minutes.
2. Perform DTC confirmation procedure of DTC P0087.
Is 1st trip DTC detected?
YES >>
GO TO 5.
NO >>
GO TO 18.

CHECK HIGH FUEL PRESSURE (FEED PRESSURE)

Perform fuel pressure release. Refer to Work Procedure.
Turn ignition switch ON and select “DATA MONITOR” mode of “ENGINE” using CONSULT.

Check the indication of “FUEL PRES SEN”.

Monitor item	Indication
FUEL PRES SEN	Approx. 0.450 Mpa or more

Is inspection result normal?

YES >>

GO TO 6.

NO >>

GO TO 10.

CHECK HIGH PRESSURE FUEL PUMP

Check high pressure fuel pump. Refer to Component Inspection.

Is inspection result normal?
YES >>
GO TO 7.
NO >>
Repair or replace the error-detected parts.
CHECK FUEL RAIL PRESSURE SENSOR

Check fuel rail pressure sensor. Refer to Component Inspection.

Is inspection result normal?
YES >>
GO TO 8.
NO >>
Repair or replace the error-detected parts.
CHECK HIGH PRESSURE FUEL LEAKAGE
1. Start the engine.
2. Visually check that the high pressure fuel pump, fuel rail, and fuel piping have no fuel leakage.
Is inspection result normal?
YES >>
GO TO 9.
NO >>
Replace the error-detected parts.
CHECK HIGH PRESSURE FUEL PUMP LIFTER

Check high pressure fuel pump lifter. Refer to Removal and Installation.

Does the lifter top surface have scratches and/or dents?
YES >>
Replace the error-detected parts.
NO >>
GO TO 16.
CHECK LOW FUEL PRESSURE

Check low fuel pressure. Refer to Work Procedure.

Is inspection result normal?
YES >>
GO TO 11.
NO >>
GO TO 16.
CHECK FUEL RAIL PRESSURE SENSOR

Check fuel rail pressure sensor. Refer to Component Inspection.

Is inspection result normal?
YES >>
GO TO 12.
NO >>
Repair or replace the error-detected parts.
CHECK HIGH PRESSURE FUEL LEAKAGE
1. Start the engine.
2. Visually check that the high pressure fuel pump, fuel rail, and fuel piping have no fuel leakage.
Is inspection result normal?
YES >>
GO TO 13.
NO >>
Replace the error-detected parts.
CHECK HIGH PRESSURE FUEL PUMP LIFTER

Check high pressure fuel pump lifter. Refer to Removal and Installation.

Does the lifter top surface have scratches and/or dents?
YES >>
Replace the error-detected parts.
NO >>
GO TO 14.
REPLACE HIGH PRESSURE FUEL PUMP

Replace the high pressure fuel pump. Refer to Removal and Installation.

>>
GO TO 15.
PERFORM DTC CONFIRMATION PROCEDURE
1. Erase DTC.
2. Perform DTC confirmation procedure. Refer to Confirmation Procedure.
Is the DTC P0087 detected again?
YES >>
Replace the fuel rail. Refer to Removal and Installation.
NO >>
INSPECTION END.
CHECK LOW PRESSURE FUEL PUMP

Check low pressure fuel pump. Refer to Component Function Check.

Is inspection result normal?
YES >>
GO TO 17.
NO >>
Repair or replace the error-detected parts.
DETECT MALFUNCTIONING PART

Check fuel hoses and fuel tubes for clogging.

Is inspection result normal?
YES >>
GO TO 18.
NO >>
Repair or replace the error-detected parts.
CHECK LOW PRESSURE FUEL LINE FOR INTERNAL LEAKAGE
1. Start the engine.
2. Visually check that the low pressure fuel pump, fuel rail, and fuel piping have no fuel leakage.
Is inspection result normal?
YES >>
INSPECTION END
NO >>
Replace the error-detected parts.

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