ECD SYSTEM (w/ DPF), 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.

P2084
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
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".

All 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 (752 °F) or more when the ignition switch is turned to ON.

  • Exhaust gas temperature sensor B1S2

  • Engine coolant temperature sensor

  • ECM (soak timer)
P242B
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
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".

All 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 (752 °F) or more when the ignition switch is turned to ON.

  • Exhaust gas temperature sensor B1S3

  • Engine coolant temperature sensor

  • ECM (soak timer)
Related Data List
DTC No. Data List
P2084

  • Exhaust Temperature B1S2

  • Exhaust Temperature B1S3

  • Coolant temp

  • Intake Air
P242B

Tech Tips


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

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

  • 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 (752 °F) or more, a DTC indicating an exhaust gas temperature sensor malfunction is stored and the MIL is illuminated (2 trip detection logic).

WIRING DIAGRAM

Refer to DTC P0545 Click here.

INSPECTION PROCEDURE

Note


  • Inspect the fuses of circuits related to this system before performing the following inspection procedure.

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

  • After replacing the fuel supply pump assembly or suction control valve, the ECM needs initialization Click here.

  • After replacing an injector assembly, the ECM needs registration Click here.

Tech Tips

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 FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2084 AND P242B)


    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 and ECT / DTC.

    4. Read DTCs.

      Result
      Result Proceed to
      P2084 and/or P242B is output A

      Except above

      P2084 and/or P242B and other DTCs are output

      		 B

    B

    GO TO DTC CHART Click here

    A

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


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

    2. Connect the intelligent tester to the DLC3.

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

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


    A

    REPLACE EXHAUST GAS TEMPERATURE SENSOR B1S2 Click here

    B

    REPLACE EXHAUST GAS TEMPERATURE SENSOR B1S3 Click here

    C

  3. READ VALUE USING INTELLIGENT TESTER (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 intelligent tester to the DLC3.

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

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

    5. Read the value.

      Standard value
      The difference between the displayed value and outside air temperature is below 5°C (9°F).

      Note

      If the difference between "Coolant Temp" and the outside air 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.


    OK

    REPLACE ECM Click here

    NG

    INSPECT ENGINE COOLANT TEMPERATURE SENSOR Click here

  4. INSPECT ENGINE COOLANT TEMPERATURE SENSOR


    1. Inspect the engine coolant temperature sensor Click here.


    OK

    REPLACE ECM Click here

    NG

    REPLACE ENGINE COOLANT TEMPERATURE SENSOR Click here

  5. REPLACE ENGINE COOLANT TEMPERATURE SENSOR


    1. Replace the engine coolant temperature sensor Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPLACE EXHAUST GAS TEMPERATURE SENSOR B1S2


    1. Replace the exhaust gas temperature sensor B1S2 Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPLACE EXHAUST GAS TEMPERATURE SENSOR B1S3


    1. Replace the exhaust gas temperature sensor B1S3 Click here.


    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 intelligent tester to the DLC3.

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

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

    NEXT

    END