ECD SYSTEM, Diagnostic DTC:P0299

DTC Code DTC Name
P0299 Turbocharger / Supercharger Underboost

DESCRIPTION

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0299 Turbocharger / Supercharger Underboost

When any condition below is met (2 trip detection logic):


  • The pressure "MAP" is 62 kPa (465 mmHg, 18.3 in.Hg) below the Target Boost Pressure for 80 seconds at an engine speed of around 2400 rpm.

  • The pressure is 70 kPa (525 mmHg, 20.7 in.Hg) below the Target Boost Pressure for 80 seconds at an engine speed of around 2800 rpm.

  • The pressure is 50 kPa (375 mmHg, 14.8 in.Hg) below the Target Boost Pressure for 80 seconds at an engine speed of 3600 to 4000 rpm.

  • Vacuum regulating valve assembly (for turbocharger control)

  • Open or short in vacuum regulating valve assembly (for turbocharger control) circuit

  • Turbocharger sub-assembly

  • Electric EGR control valve assembly

  • Disconnected pipe between turbo and intake manifold

  • Disconnected manifold absolute pressure sensor hose

  • Manifold absolute pressure sensor

  • Injection system (reduction in fuel injection volume)

  • EGR does not close

  • Throttle valve stuck closed

  • Vacuum hose

  • Fuel filter element assembly clog

  • ECM

 Comes on DTC stored

Tech Tips

If DTC P0299 is stored, the following symptoms may appear.

When the nozzle vane of the turbocharger is stuck open:


  • Lack of power

  • Vehicle surge or hesitation under light or medium load

Related Data List
DTC No. Data List
P0299

  • Target Booster Pressure

  • MAP

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0299 After warming up the engine, the vehicle is driven at a constant vehicle speed at an engine speed of 2400 rpm or more for 2 minutes

CAUTION / NOTICE / HINT

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.

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 / Trouble Codes.


      Powertrain > Engine > Trouble Codes

    4. Read the DTCs.

      Result
      Proceed to
      P0299 is output
      P0299 and other DTCs are output

    P0299 and other DTCs are output

    GO TO DTC CHART Click here

    P0299 is output

  2. CHECK FREEZE FRAME DATA (FUEL PRESS AND TARGET COMMON RAIL PRESSURE)


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


      Powertrain > Engine > Trouble Codes

    2. Record the stored DTCs and freeze frame data.

      Result
      Result Proceed to
      Difference between Fuel Press and Target Common Rail Pressure of freeze frame data is 20000 kPa or more A
      Except above B

    B

    GO TO LACK OF POWER OR HESITATION Click here

    A

    GO TO INSPECT CLOGGED FUEL PIPE (LACK OF POWER OR HESITATION) Click here