P0299 – Turbocharger Under Boost Condition MMC L200 IV



FUNCTION

  • The engine-ECU checks whether the boost pressure is not lower than the specified value.

  • TROUBLE JUDGEMENT

  • Engine is running
  • The opening degree of accelerator pedal is 23% for 3 seconds and the boost pressure is not lower than the specified value.

  • PROBABLE CAUSES

  • Intercooler air hose disconnected or damaged
  • Vacuum hose of manifold absolute pressure sensor disconnected or damaged
  • Failed manifold absolute pressure sensor
  • Failed engine-ECU

  • DIAGNOSIS PROCEDURE

    STEP 1. Check on intercooler air hose.

  • Check whether the hose between turbocharger and inlet manifold is disconnected or damaged.
  • Q. Is the check result normal?

    STEP 2. Check on vacuum hose of manifold absolute pressure sensor.

  • Check whether the vacuum hose of manifold absolute pressure sensor is disconnected or damaged.
  • Q. Is the check result normal?

    STEP 3. Check turbocharger supercharging pressure.

    Q. Is the check result normal?

    STEP 4. Check on clogged intercooler.

  • Check whether the intercooler is being clogged or not.
  • Q. Is the check result normal?

    STEP 5. Check on clogged EGR cooler.

  • Check whether the EGR cooler is being clogged or not.
  • Q. Is the check result normal?

    STEP 6. Check on clogged EGR pipe (A, B).

  • Check whether the EGR pipe (A, B) is being clogged or not.
  • Q. Is the check result normal?

    STEP 7. M.U.T.-III diagnosis code

  • Reconfirmation of diagnosis code.
  • Q. Is the check result normal?

    Author: admin