DTC Troubleshooting: P0087
DTC P0087: Fuel Rail Pressure Too Low
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and 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 spill valve malfunction

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

1.
Problem verification-at idling:

Problem verification-at idling
?1.
Record all freeze data and the on-board snapshots with the HDS.

?2.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?3.
Clear the DTC with the HDS.


?4.
Start the engine. Hold the engine speed at 3,000 rpm without load (A/T 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.
2.
Problem verification-at test-driving:

Problem verification-at test-driving
?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
IAT SENSOR
Signal
Current conditions
Values
Unit
ENGINE SPEED
    
VEHICLE SPEED
    
MAP SENSOR
    
TP SENSOR
    
APP SENSOR
    
ECT SENSOR 1
    
IAT SENSOR (2)
    

?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
     
     
     
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.?
3.
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
     
     
     
4.
Fuel rail pressure sensor check 1:

Fuel rail pressure sensor check 1
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF 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
Current conditions
Values
Unit
FUEL PRESSURE CONVERTED FROM PF SENSOR
    

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

Does the value change to about 0 kPa?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
5.
Fuel rail pressure sensor check 2:

Fuel rail pressure sensor check 2
?1.
Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

?2.
Install PGM-FI main relay 2.

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

?4.
A/T: Shift to D while pressing brake pedal firmly, then press the accelerator pedal.
NOTE: Do not move the shift lever or remove your foot off the brake, while raising the engine speed.
M/T: Snap the throttle for several times.

?5.
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
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
     
     
     
6.
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
     
     
     
7.
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
     
     
     
     
NO
     
     
     
Repair verification:

?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Reset the PCM with the HDS.


?3.
Do the PCM idle learn procedure.

?4.
Select the DI FUEL PRESSURE TEST in the INSPECTION MENU with the HDS.

  

?5.
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
     
     
     
Check for poor connections or loose terminals at the fuel rail pressure sensor, the fuel rail pressure control valve, the fuel rail pressure regulator, and the PCM, then go to step 1.
     
NO
     
     
     
Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?