ECD SYSTEM(w/o EGR System), Diagnostic DTC:P0299

DTC Code DTC Name
P0299 Turbo / Super Charger Underboost

DESCRIPTION

Refer to DTC P0046.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0299 Turbo / Super Charger Underboost The pressure is 55 kPa below the Target Booster Pressure for 80 seconds at an engine speed of 2800 to 4400 rpm (1 trip detection logic).
  • Turbocharger sub-assembly

  • Extremely low battery voltage (P0560 output simultaneously)

  • Disconnected pipe between turbo and intake manifold

  • Disconnected manifold absolute pressure sensor hose

  • Throttle valve stuck closed

  • Exhaust system or intake system modified (leading to increased pressure loss, etc.)

  • Manifold absolute pressure sensor

  • Injection system (reduction in fuel injection volume)

  • Fuel filter element assembly clog

  • ECM

Comes on DTC stored
Related Data List
DTC No. Data List
P0299
  • Target Booster Pressure

  • MAP

  • Target Common Rail Pressure

  • Common Rail Pressure

Tech Tips


  • If DTC P0299 is stored due to the variable nozzle being stuck open, the following symptoms may appear:


    • Lack of power

    • Vehicle surge or hesitation under light or medium load

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0299 Accelerate vehicle with accelerator depressed halfway or more starting from a speed of 120 km/h (75 mph) or more for 2 minutes (make sure gear is fixed and does not change)

CAUTION / NOTICE / HINT

Note


  • After replacing the ECM, the new ECM needs registration (Click here ) and initialization Click here.

  • After replacing an injector assembly, the ECM needs registration Click here.

Tech Tips


  • 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.

  • The state of the problem symptom can be determined by comparing the Data List items "MAP" and "Target Booster Pressure" while accelerating at a medium to high engine speed.

PROCEDURE


  1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0299)


    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 / Trouble Codes.

    4. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      P0299 is output A
      P0299 and other DTCs are output B

    B
    A
  2. CHECK FREEZE FRAME DATA (COMMON RAIL PRESSURE AND TARGET COMMON RAIL PRESSURE)


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

    2. Record the stored DTCs and freeze frame data.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      Difference between Common Rail Pressure and Target Common Rail Pressure of freeze frame data is 20000 kPa or more A
      Except above B

    A
    B