СИСТЕМА ECD, Diagnostic DTC:P2084, P242B

DTC Code DTC Name
P2084 Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
P242B Exhaust Gas Temperature Sensor Circuit Range / Performance Bank 1 Sensor 3

DESCRIPTION

Refer to DTC P0545.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P2084 Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2

Both of the conditions are met (2 trip detection logic):

(a) The battery voltage is 8 V or higher.

(b) After the engine is stopped and the vehicle is left as is for 10 hours or more, the difference between "Exhaust Temperature B1S2" and "Coolant Temp" is 400°C (720°F) or higher when the ignition switch is turned to ON.

  • No. 2 exhaust gas temperature sensor (B1S2)

  • Engine coolant temperature sensor

  • ECM (soak timer)

 Comes on DTC stored
P242B Exhaust Gas Temperature Sensor Circuit Range / Performance Bank 1 Sensor 3

Both of the conditions are met (2 trip detection logic):

(a) The battery voltage is 8 V or higher.

(b) After the engine is stopped and the vehicle is left as is for 10 hours or more, the difference between "Exhaust Temperature B1S3" and "Coolant Temp" is 400°C (720°F) or higher when the ignition switch is turned to ON.

  • No. 3 exhaust gas temperature sensor (B1S3)

  • Engine coolant temperature sensor

  • ECM (soak timer)

 Comes on DTC stored
Related Data List
DTC No. Data List
P2084

  • Exhaust Temperature B1S2

  • Exhaust Temperature B1S3

  • Coolant temp

  • Intake Air
P242B

Tech Tips


  • If DTC P2084 and/or P242B is stored, the following symptoms may appear:


    • White smoke

MONITOR DESCRIPTION

The ECM compares the values from exhaust temperature sensors B1S2 and B1S3 with the engine coolant temperature when the ignition switch is turned to ON after the vehicle has been left soaking for 10 hours or more. If the difference is 400°C (720°F) or higher, a DTC indicating an exhaust gas temperature sensor malfunction is stored and the MIL is illuminated (2 trip detection logic).

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P2084 Stop the engine, leave the vehicle as is for 1 to 2 hours and confirm that "Exhaust Temperature B1S2" is approximately the same value as "Intake Air".
P242B Stop the engine, leave the vehicle as is for 1 to 2 hours and confirm that "Exhaust Temperature B1S3" is approximately the same value as "Intake Air".

WIRING DIAGRAM

Refer to DTC P0545.

Click here

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.

  • Sensor 2 represents the sensor located upstream of the DPF catalytic converter.

  • Sensor 3 represents the sensor located downstream of the DPF catalytic converter.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2084 AND P242B)


    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 and ECT / Trouble Codes.

    4. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC P2084 and/or P242B is output A
      DTC P2084 and/or P242B and other DTCs are output B

      Tech Tips

      If any DTCs other than DTC P2084 or P242B are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ VALUE USING GTS (EXHAUST TEMPERATURE B1S2 AND B1S3)


    1. Leave the vehicle as is for 1 to 2 hours with the engine stopped.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Exhaust Temperature B1S2 and Exhaust Temperature B1S3.


      Powertrain > Engine and ECT > Data List
      Tester Display
      Exhaust Temperature B1S2
      Exhaust Temperature B1S3

    5. Read the values.

      Result
      Result Proceed to
      Value of "Exhaust Temperature B1S2" is 400°C (752°F) or higher A
      Value of "Exhaust Temperature B1S3" is 400°C (752°F) or higher B
      Except above C

      Tech Tips

      If the exhaust gas temperature sensor is normal, the exhaust gas temperature drops when the vehicle is left as is for 1 to 2 hours with the engine stopped. If the exhaust gas temperature does not drop, the exhaust gas temperature sensor may be malfunctioning.


    B

    REPLACE NO. 3 EXHAUST GAS TEMPERATURE SENSOR (B1S3) Click here

    C

    READ VALUE USING GTS (ENGINE COOLANT TEMPERATURE) Click here

    A

  3. REPLACE NO. 2 EXHAUST GAS TEMPERATURE SENSOR (B1S2)


    1. Replace the No. 2 exhaust gas temperature sensor (B1S2).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here

  4. REPLACE NO. 3 EXHAUST GAS TEMPERATURE SENSOR (B1S3)


    1. Replace the No. 3 exhaust gas temperature sensor (B1S3).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here

  5. READ VALUE USING GTS (ENGINE COOLANT TEMPERATURE)


    1. Allow the engine to soak for 1 to 2 hours.

      Tech Tips


      • It is not necessary to allow the engine to soak if the engine is cold.

      • The engine cools faster if the hood is opened.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Coolant Temp.


      Powertrain > Engine and ECT > Data List
      Tester Display
      Coolant Temp

    5. Read the value.

      OK
      The difference between the displayed value and ambient temperature is below 5°C (9°F).

      Note

      If the difference between "Coolant Temp" and the ambient temperature is 5°C (9°F) or higher, the heat from the engine affects the intake air temperature sensor, causing an incorrect value to be displayed. In this case, allow the engine to soak again.

      Result
      Proceed to
      OK
      NG

    NG

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

    OK

  6. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here

  7. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 6 Click here

    NG

  8. REPLACE ENGINE COOLANT TEMPERATURE SENSOR


    1. Replace the engine coolant temperature sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Leave the vehicle as is for 1 to 2 hours with the engine stopped.

      Tech Tips


      • It is not necessary to allow the engine to soak if the engine is cold.

      • The engine cools faster if the hood is opened.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Exhaust Temperature B1S2, Exhaust Temperature B1S3 and Intake Air.


      Powertrain > Engine and ECT > Data List
      Tester Display
      Exhaust Temperature B1S2
      Exhaust Temperature B1S3
      Intake Air

    5. Read the value.

      OK
      The values of "Exhaust Temperature B1S2" and "Exhaust Temperature B1S3" are both approximately the same as "Intake Air".
      Result
      Proceed to
      NEXT

    NEXT

    END