ECD SYSTEM, Diagnostic DTC:P0299

DTC Code DTC Name
P0299 Turbocharger / Supercharger "A" Underboost Condition

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0299

Turbocharger / Supercharger "A" Underboost Condition

Actual turbocharger pressure is at lower than target pressure threshold for 7 seconds.

(3 trip detection logic)

  • Leaks from air intake system

  • Exhaust gas leak before turbocharger sub-assembly

  • Diesel throttle body assembly

  • ECM

Comes on

DTC stored
Table 1. Related Data List

DTC No.

Data List

P0299

  • Target Booster Pressure

  • MAP

CAUTION / NOTICE / HINT

Note:

When replacing the ECM, the ECM needs registration and initialization.

Click here

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE

  1. CHECK INTAKE SYSTEM

    1. Start the engine.

    2. Check air duct between intake silencer, mass air flow meter sub-assembly and turbocharger for leaks.

    3. Check air duct between turbocharger and intake manifold for leaks.

      Tip:

      • Oily patches are signs of leaks.

      • Check whether sealing rings on charge air hoses are rolled back or missing.

      OK

      No leakage.

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE INTAKE SYSTEMClick here

    OK

  2. CHECK EXHAUST GAS LEAK

    1. Check for exhaust gas leak before the turbocharger sub-assembly.

      OK

      No exhaust gas leak.

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE EXHAUST GAS LEAKClick here

    OK

  3. PERFORM ACTIVE TEST USING GTS (ACTUATOR TEST OF THROTTLE VALVE)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Enter the following menus: Powertrain / Engine and ECT / Active Test / Actuator Test of Throttle Valve / Data List / Throttle Valve Actuator Position.

      Powertrain > Engine and ECT > Active Test

      Active Test Display

      Actuator Test of Throttle Valve

      Data List Display

      Throttle Valve Actuator Position

    4. Perform the following steps 1 to 4.

    5. Step 1

      1. Perform Active Test of throttle valve with control value of 5% (opening ratio in %).

      2. Monitor the difference of the control value and Throttle Valve Actuator Position value (0 +/-3%). Throttle valve must operate within 1 second.

    6. Step 2

      1. Wait for 2 seconds or more.

    7. Step 3

      1. Perform Active Test of throttle valve with control value of 91% (opening ratio in %).

      2. Monitor the difference of the control value and Throttle Valve Actuator Position value (0 +/-3%). Throttle valve must operate within 1 second.

    8. Step 4

      1. Wait for 2 seconds or more.

    9. Perform the above steps 1 to 4 and check that the part operates as specified.

      OK

      Part operates as specified.

    Result

    Proceed to

    OK

    NG
    OK

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0299)Click here

    NG

  4. REPLACE DIESEL THROTTLE BODY ASSEMBLY

    1. Replace the diesel throttle body assembly.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0299)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    8. Read the DTCs.

    Result

    Result

    Proceed to

    No DTC output

    A

    DTC P0299

    B
    A

    END

    B

    REPLACE ECMClick here

  6. REPAIR OR REPLACE EXHAUST GAS LEAK

    1. Repair or replace the malfunctioning parts of the exhaust system.

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  7. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  8. REPAIR OR REPLACE INTAKE SYSTEM

    1. Repair or replace the malfunctioning parts of the intake system.

    Result

    Proceed to

    NEXT
    NEXT

  9. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

    7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT
    NEXT

    END