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Home >> Mitsubishi >> 2024 >> Outlander ES, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (1 Of 4) >> DTC/Circuit Diagnosis >> DTC P0136: O2 Sensor 2 Bank 1 >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

  1. INSPECTION START 

    Confirm the detected malfunction (A or B). DTC DESCRIPTION 

    Which malfunction is detected? 

    A >>

    GO TO  2.

    B >>

    GO TO  7.

  2. CHECK HO2S2 CONNECTOR FOR WATER 
    1. Turn ignition switch OFF.
    2. Disconnect heated oxygen sensor 2 harness connector.
    3. Check connectors for water.

    Water should not exist  .

    Is the inspection result normal? 

    YES >>

    GO TO  3.

    NO >>

    Repair or replace error-detected parts.

  3. CHECK HO2S2 GROUND CIRCUIT 
    1. Disconnect ECM harness connector.
    2. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      E35 4 F52 97 Existed
    3. Also check harness for short to power.

    Is the inspection result normal? 

    YES >>

    GO TO  4.

    NO >>

    Repair or replace error-detected parts.

  4. CHECK HO2S2 INPUT SIGNAL CIRCUIT 
    1. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      E35 3 F52 92 Existed
    2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and ground.
      + - Continuity
      HO2S2
      Connector Terminal
      E35 3 Ground Not existed
      + - Continuity
      ECM
      Connector Terminal
      F52 92 Ground Not existed
    3. Also check harness for short to power.

    Is the inspection result normal? 

    YES >>

    GO TO  5.

    NO >>

    Repair or replace error-detected parts.

  5. CHECK HEATED OXYGEN SENSOR 2 

    Check the heated oxygen sensor 2. Refer to COMPONENT INSPECTION .

    Is the inspection result normal? 

    YES >>

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO >>

    GO TO  6.

  6. REPLACE HEATED OXYGEN SENSOR 2 

    Replace heated oxygen sensor 2. Refer to EXPLODED VIEW .

    >>

    INSPECTION END

  7. CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE CLEAR 
    1. Clear the mixture ratio self-learning value clear. Refer to DESCRIPTION .
    2. Run engine for at least 10 minutes at idle speed.

    Is the 1st trip DTC P0172 detected? Is it difficult to start engine? 

    YES >>

    Perform trouble diagnosis for DTC P0172. DTC DESCRIPTION 

    NO >>

    GO TO  8.

  8. CHECK HO2S2 GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect heated oxygen sensor 2 harness connector.
    3. Disconnect ECM harness connector.
    4. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      E35 4 F52 97 Existed
    5. Also check harness for short to ground and to power.

    Is the inspection result normal? 

    YES >>

    GO TO  9.

    NO >>

    Repair or replace error-detected parts.

  9. CHECK HO2S2 INPUT SIGNAL CIRCUIT 
    1. Check the continuity between HO2S2 harness connector and ECM harness connector.
      + - Continuity
      HO2S2 ECM
      Connector Terminal Connector Terminal
      E35 3 F52 92 Existed
    2. Check the continuity between HO2S2 harness connector and ground, or ECM harness connector and ground.
      + - Continuity
      HO2S2
      Connector Terminal
      E35 3 Ground Not existed
      + - Continuity
      ECM
      Connector Terminal
      F52 92 Ground Not existed
    3. Also check harness for short to power.

    Is the inspection result normal? 

    YES >>

    GO TO  10.

    NO >>

    Repair open circuit or short to ground or short to power in harness or connectors.

  10. CHECK HEATED OXYGEN SENSOR 2 

    Check the heated oxygen sensor 2. Refer to COMPONENT INSPECTION .

    Is the inspection result normal? 

    YES >>

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO >>

    GO TO  11.

  11. REPLACE HEATED OXYGEN SENSOR 2 

    Replace heated oxygen sensor 2. Refer to EXPLODED VIEW .

    >>

    INSPECTION END

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