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

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

      Result

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

    B → See step   9 

    A: Go to next step 

  2. READ VALUE USING TECHSTREAM (FREEZE FRAME DATA) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the Techstream on.
    3. Enter the following menus: Powertrain / Engine / Trouble Codes.
    4. Read the freeze frame data.

      Result

      Display (DTC output) Proceed to
      Output while driving A
      Output while idling B

    B → See step   6 

    A: Go to next step 

  3. PERFORM ACTIVE TEST USING TECHSTREAM (CHECK FUEL PUMP FOR HIGH PRESSURE [BANK1]) 
    1. Connect the Techstream to the DLC3.
    2. Start the engine and turn the Techstream on.
    3. Enter the following menus: Powertrain / Engine / Active Test / Control the Target Fuel Press / All Data / Fuel Press.
    4. Check that the fuel pressure fluctuates when the target fuel pressure changes.

      HINT: 

      The Active Test operation lowers the target fuel pressure by 12.5% or increase the target fuel pressure 25%.

      OK

      Fuel pressure fluctuates.

    NG → See step   6 

    OK: Go to next step 

  4. REPLACE FUEL PUMP (FOR HIGH PRESSURE [BANK 1]) 
    1. Replace the fuel pump (for high pressure). Refer to REMOVAL .

    NEXT: Go to next step 

  5. CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P0088 IS OUTPUT AGAIN) 
    1. Clear DTCs. Refer to DTC CHECK / CLEAR .
    2. Connect the Techstream to the DLC3.
    3. Start the engine and turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read the DTCs.

      Result

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

    B → END 

    A → See step   8 

  6. REPLACE FUEL PUMP (FOR HIGH PRESSURE [BANK 2]) 
    1. Replace the fuel pump (for high pressure). Refer to REMOVAL .

    NEXT: Go to next step 

  7. CHECK IF DTC OUTPUT REOCCURS (SEE IF DTC P0088 IS OUTPUT AGAIN) 
    1. Clear DTCs. Refer to DTC CHECK / CLEAR .
    2. Connect the Techstream to the DLC3.
    3. Start the engine and turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read the DTCs.

      Result

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

    B → END 

    A → See step   10 

  8. REPLACE ECM. Refer to  REMOVAL 
  9. GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 
  10. REPLACE ECM. Refer to  REMOVAL 
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