ECD SYSTEM, Diagnostic DTC:P2084 and 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 (752°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 (752°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
Table 1. Related Data List

DTC No.

Data List

P2084

  • Exhaust Temperature B1S2

  • Exhaust Temperature B1S3

  • Coolant temp

  • Intake Air

P242B
Tip:

  • 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 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).

Tip:

  • 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 > 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
      Tip:

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

    B

    GO TO DTC CHART

    Click hereClick 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 > 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
      Tip:

      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

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick 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

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  5. READ VALUE USING GTS (ENGINE COOLANT TEMPERATURE)

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

      Tip:

      • 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 > 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 SENSORClick here

    OK

  6. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  7. INSPECT ENGINE COOLANT TEMPERATURE SENSOR

    1. Inspect the engine coolant temperature sensor.

      Click here

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECMClick 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.

      Tip:

      • 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 > 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