ECD SYSTEM(w/ Urea SCR System), Diagnostic DTC:P2226, P2228, P2229

DTC Code DTC Name
P2226 Barometric Pressure Circuit
P2228 Barometric Pressure Circuit Low Input
P2229 Barometric Pressure Circuit High Input

DESCRIPTION

To detect atmospheric pressure, the built-in atmospheric pressure sensor in the ECM is used. Using the atmospheric pressure, the ECM corrects the injection volume, timing and duration, and adjusts the common rail internal fuel pressure in order to optimize engine combustion.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2226 Barometric Pressure Circuit Atmospheric pressure sensor voltage is 1.4 V or less, or 4.0 V or higher for 0.5 seconds (1 trip detection logic). ECM Comes on DTC stored
P2228 Barometric Pressure Circuit Low Input Atmospheric pressure sensor voltage is 1.4 V or less for 0.5 seconds (1 trip detection logic). ECM Comes on DTC stored
P2229 Barometric Pressure Circuit High Input Atmospheric pressure sensor voltage is 4.0 V or higher for 0.5 seconds (1 trip detection logic). ECM Comes on DTC stored
Related Data List
DTC No. Data List

P2226

P2228

P2229

  • Atmosphere Pressure

  • MAP

Tech Tips


  • When the ignition switch is ON, the intake manifold pressure, "MAP", is approximately equal to atmospheric pressure.

  • Under standard atmospheric pressure conditions, the output of the atmospheric pressure sensor is 101 kPa. For every 100 m increase in elevation, pressure drops by 1 kPa. This varies by weather (high atmospheric pressure, low atmospheric pressure).

  • If DTC P2226, P2228 and/or P2229 is stored, the following symptoms may appear:


    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern

P2226

P2228

P2229

 Ignition switch ON for 1 second or more

CAUTION / NOTICE / HINT

Note

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

PROCEDURE


  1. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  2. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for 30 seconds.

    6. Turn the ignition switch to ON and wait for 1 second or more.

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

    8. Confirm that the DTC is not output again.


      Powertrain > Engine > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END