DTC Troubleshooting: P0089
DTC P0089: Fuel Pressure Regulator Performance
NOTE:
Before you troubleshoot, review the general troubleshooting information.
If any of the DTCs listed below are stored at the same time as P0089, troubleshoot those DTCs first, then recheck for P0089.
P0171, P0172: Fuel system
P0190, P0191, 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)
P2623: High pressure fuel pump

DTC Description
Confirmed DTC
Pending DTC
P0089 Fuel Pressure Regulator Performance
    

1.
Problem verification (idling):

Problem verification (idling)
?1.
Record all 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.

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

?6.
Select the DI Fuel Pressure Test in the INSPECTION MENU with the HDS.

  

Is the result OK?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
The failure is duplicated. Go to step 3.
2.
Problem verification (test-drive):

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 (Hi Res)
TP SENSOR
APP SENSOR
ECT SENSOR 1
FUEL PRESSURE CONVERTED FROM PF SENSOR
FUEL PRESSURE DIRECT INJECTION SYSTEM
IAT SENSOR (1)
Signal
Current conditions
Values
Unit
ENGINE SPEED
    
VEHICLE SPEED
    
MAP Sensor (Hi Res)
    
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
P0089 Fuel Pressure Regulator Performance
    

Is DTC P0089 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.
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 4.
     
NO
     
     
     
4.
High pressure fuel pump cam and pump lifter visual check:

High pressure fuel pump cam and pump lifter visual check
?1.
Remove the high pressure fuel pump.

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

Are the parts OK?

     
YES
     
     
     
     
NO