ECD SYSTEM (w/o DPF), Diagnostic DTC:P0069

DTC Code DTC Name
P0069 MAP Sensor Too High or Too Low

DESCRIPTION

To detect atmospheric pressure, the atmospheric pressure sensor built into the ECM is used in the common rail system. Following the changes in the atmospheric pressure, the ECM corrects the fuel injection volume, timing and duration, and adjusts the common rail internal fuel pressure to optimize combustion.

P0069
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
1 second elapses after ignition switch turned from off to ON (starter remains off) After the ignition switch is turned to ON, the difference between the atmospheric pressure sensor output and manifold absolute pressure sensor output is more than 8 kPa for 0.5 seconds (2 trip detection logic). ECM
Related Data List
DTC No. Data List
P0069

  • Atmosphere Pressure

  • MAP

Tech Tips


  • Turn the ignition switch to ON and check the Atmosphere Pressure and MAP items in the Data List. If the atmospheric pressure displayed on the tester differs greatly from the actual atmospheric pressure (standard: 101 kPa), the sensor (atmospheric pressure sensor or manifold absolute pressure sensor) is malfunctioning.

  • If DTC P0069 is stored, the following symptoms may appear:


    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power

INSPECTION PROCEDURE

Note

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

Tech Tips


  • Although the DTC titles say manifold absolute pressure Sensor Too High or Too Low, these DTCs relate to the atmospheric pressure sensor.

  • Read freeze frame data using the intelligent tester. 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 OTHER DTC OUTPUT (IN ADDITION TO DTC P0069)


    1. Connect the intelligent tester to the DLC3.

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

    3. Enter the following menus: Powertrain / Engine / DTC.

    4. Read the DTCs.

      Result
      Result Proceed to
      P0069 and other DTCs are output A
      P0069 is output B

      Tech Tips

      If codes other than P0069 are output, perform troubleshooting for those DTCs first.


    A

    GO TO DTC CHART Click here

    B

  2. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  3. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Turn the ignition switch off.

    4. Turn the ignition switch to ON for 1 second.

    5. Enter the following menus: Powertrain / Engine / DTC.

    6. Confirm that the DTC is not output again.


    NEXT

    END