DTC Troubleshooting: P0087

DTC P0087: Fuel Rail Pressure Too Low

NOTE:

	Before you troubleshoot, review the general troubleshooting information.
	If the vehicle was out of fuel and the engine stalled before this DTC was stored, refuel, then clear the DTC with the HDS.
	If the fuel leak occurs, this DTC will be stored. Check the fuel leak before troubleshooting.
	If any of the DTCs listed below are stored at the same time as P0087, troubleshoot those DTCs first, then recheck for P0087. P0192, P0193: Fuel rail pressure sensor P0201, P0202, P0203, P0204: No. 1?No. 4 cylinder injector(s) P0300, P0301, P0302, P0303, P0304: No. 1?No. 4 cylinder misfire P0351, P0352, P0353, P0354: No. 1?No. 4 cylinder ignition coil(s) P219A: Air-fuel ratio variation of cylinders P2623: High pressure fuel pump

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0087 Fuel Rail Pressure Too Low

Problem verification (idling):

Problem verification (idling)

?1.	Record all freeze data and the on-board snapshots with the HDS.

?2.	Turn the vehicle to the ON mode.

?3.	Clear the DTC with the HDS.

?4.	Start the engine. Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?5.	Select the DI FUEL PRESSURE TEST in the INSPECTION MENU with the HDS.

Is the result OK?


	YES

Go to step 2.


	NO

Go to step 3.

Problem verification (test-drive):

Problem verification (test-drive)

?1.

Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:

	ENGINE SPEED
	VEHICLE SPEED
	MAP SENSOR
	TP SENSOR
	APP SENSOR
	ECT SENSOR 1
	FUEL PRESSURE CONVERTED FROM PF SENSOR
	FUEL PRESSURE DIRECT INJECTION SYSTEM
	IAT SENSOR (1)

Signal	Current conditions
Signal	Values	Unit
ENGINE SPEED
VEHICLE SPEED
MAP SENSOR
TP SENSOR
APP SENSOR
ECT SENSOR 1
FUEL PRESSURE CONVERTED FROM PF SENSOR
FUEL PRESSURE DIRECT INJECTION SYSTEM
IAT SENSOR (1)

?2.

Check for Pending or Confirmed DTCs with the HDS.

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0087 Fuel Rail Pressure Too Low

Is DTC P0087 indicated?


	YES

The failure is duplicated. Go to step 3.


	NO

Intermittent failure, the system is OK at this time. Test PGM-FI main relay 2. If the relay is OK, check for a poor connection or loose terminals at the fuel rail pressure sensor, the high pressure fuel pump, and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?

Spill valve operation check:

Spill valve operation check

?1.	Start the engine, then let it idle.

?2.	Check some noise or vibration from the spill valve on the high pressure fuel pump. If the high pressure fuel pump runs, you will hear some noise from the spill valve.

Is there any noise or vibration?


	YES

Go to step 4.


	NO

Replace the high pressure fuel pump.?

Fuel rail pressure sensor check 1:

Fuel rail pressure sensor check 1

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Remove PGM-FI main relay 2 (A) from the under-dash fuse/relay box.

?3.	Start the engine, and let it idle until it stalls.

?4.	After the engine stalls, crank the engine for several times.

?5.

Check the parameter(s) below with the HDS.

Signal	Threshold		Current conditions
Signal	Values	Unit	Values	Unit
FUEL PRESSURE CONVERTED FROM PF SENSOR	Less than 1,000	kPa

NOTE: It is normal if the value of several hundred kPa is indicated.

Do the current condition(s) match the threshold?


	YES

Go to step 5.


	NO

Replace the fuel rail (fuel rail pressure sensor).?

Fuel rail pressure sensor check 2:

Fuel rail pressure sensor check 2

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.	Install PGM-FI main relay 2.

?3.	Start the engine.

?4.	Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?5.	CVT: Shift the transmission to D position/mode while pressing the brake pedal firmly, then press the accelerator pedal. NOTE: Do not shift the transmission or remove your foot off the brake pedal, while raising the engine speed. M/T: Snap the throttle for several times.

?6.

Check the parameter(s) below with the HDS.

NOTE: For M/T, use the Line Graph Setup mode with the HDS to compare the values.

Signal	Current conditions
Signal	Values	Unit
FUEL PRESSURE CONVERTED FROM PF SENSOR
FUEL PRESSURE DIRECT INJECTION SYSTEM

Are both values almost the same?


	YES

The fuel rail pressure sensor is OK. Go to step 6.


	NO

Replace the fuel rail (fuel rail pressure sensor).?

Fuel pressure check (low pressure side):

Fuel pressure check (low pressure side)

?1.	Check the fuel pressure.

Is the fuel pressure OK?


	YES

The fuel pressure (low pressure side) is OK. Go to step 7.


	NO

Replace the fuel pump, the fuel pressure regulator, the fuel filter, and the fuel lines as needed.?

High pressure fuel pump visual check:

High pressure fuel pump visual check

?1.	Remove the high pressure fuel pump.

?2.	Visually check the cam that drives a high pressure fuel pump and the roller of the high pressure fuel pump for wear or damage.

Are the parts OK?


	YES

Replace the high pressure fuel pump.?


	NO

Check for damage of the cam and the roller.?