DTC 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 a fuel leak occurs, this DTC will be stored. Repair 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, P0205, P0206: No. 1-No. 6 cylinder injector (s)

  P0300, P0301, P0302, P0303, P0304, P0305, P0306: No. 1-No. 6 cylinder misfire

  P0351, P0352, P0353, P0354, P0355, P0356: No. 1-No. 6 cylinder ignition coil (s)

  P219A, P219B: Air-fuel ratio variation of cylinders

  P064A: High pressure fuel pump

DTC (PGM-FI)

1. Problem verification (idling)

   -1. Record all 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.

   -5. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.

   -6. Select the DI FUEL PRESSURE TEST in the INSPECTION MENU with the HDS.

   DI FUEL PRESSURE TEST

   Is the result OK?

   YES 

   Go to step 2.

   NO 

   The failure is duplicated. Go to step  3.

2. Problem verification (test-drive):

   -1. Test-drive the vehicle for several minutes in the range of these recorded on-board snapshot 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)

   Data List

   Signal	Current conditions
   	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
   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 on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

3. Spill valve operation check

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

   -2. Check for noise or vibration from the spill valve on the high pressure fuel pump.

   When 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 .

4. Fuel rail pressure sensor check 1

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

   -2. Remove PGM-FI main relay 2 .

   -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
   	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) .

5. 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 (in P or N) until the radiator fan comes on, then let it idle.

   -5. 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.

   -6. Check the parameter (s) below with the HDS.

   Signal	Current conditions
   	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) .

6. 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 

   Check the fuel pump, the fuel pressure regulator, the fuel filter , and the fuel lines .

7. 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 , and replace the exhaust camshaft and/or the high pressure fuel pump if needed.