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Home >> Lexus >> 2009 >> IS 250 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS P0010 - P0368) >> SFI System >> DTC P0088: Fuel Rail / System Pressure - Too High >> Procedure

DTC P0088: Fuel Rail / System Pressure - Too High: Procedure

  1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0088) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the tester on.
    3. Clear DTCs.
    4. Start the engine.
    5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    6. Read the DTCs using Techstream.

      Result

      Display (DTC output) Proceed to
      P0088 A
      P0088 and other DTCs B

      HINT: 

      If any codes other than P0088 are output, perform troubleshooting for those DTCs first.

    B → GO TO DTC CHART 

    A: Go to next step 

  2. CHECK FUEL PRESSURE SENSOR 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the tester on.
    3. Start the engine.
    4. Turn the tester on.
    5. Enter the following menus: Powertrain / Engine and ECT / Data List / Fuel Press.
    6. Check that the fuel pressure fluctuates when the engine is raced.

      OK

      Fuel pressure fluctuates.

    NG → REPLACE FUEL PRESSURE SENSOR 

    OK: Go to next step 

  3. REPLACE FUEL PUMP FOR HIGH PRESSURE 
    1. Replace the fuel pump for high pressure. Refer to COMPONENTS .

    NEXT: Go to next step 

  4. CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P088 IS OUTPUT AGAIN) 
    1. Connect Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the tester on.
    3. Clear DTCs.
    4. Start the engine.
    5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    6. Read the DTCs using Techstream.

      Result

      Display (DTC output) Proceed to
      P0088 A
      No output B

    B → END 

    A → REPLACE ECM 

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