ECD SYSTEM(w/ DPF), Diagnostic DTC:P0405, P0406

DTC Code DTC Name
P0405 Exhaust Gas Recirculation Sensor "A" Circuit Low
P0406 Exhaust Gas Recirculation Sensor "A" Circuit High

DESCRIPTION

The EGR valve position sensor is mounted on the electric EGR control valve assembly and used for detecting the EGR valve angle. The EGR valve angle detected by the sensor is sent to the ECM as feedback. The ECM then regulates the EGR valve angle in accordance with engine running conditions.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0405 Exhaust Gas Recirculation Sensor "A" Circuit Low

EGR valve position sensor output voltage is less than 0.2 V for 2 seconds.

(1 trip detection logic)

  • Open or short in EGR valve position sensor circuit

  • Electric EGR control valve assembly (EGR valve position sensor)

  • ECM

 Comes on DTC stored
P0406 Exhaust Gas Recirculation Sensor "A" Circuit High

EGR valve position sensor output voltage is higher than 4.8 V for 2 seconds.

(1 trip detection logic)

  • Open or short in EGR valve position sensor circuit

  • Electric EGR control valve assembly (EGR valve position sensor)

  • ECM

 Comes on DTC stored

CONFIRMATION DRIVING PATTERN

DTC No. DTC Detection Drive Pattern
P0405 Ignition switch ON for 2 seconds or more
P0406

MONITOR DESCRIPTION

When the output voltage of the EGR valve position sensor deviates from the normal operating range of 0.2 to 4.8 V for more than 2 seconds, the ECM interprets this as a malfunction of the sensor circuit and illuminates the MIL.

WIRING DIAGRAM

Refer to DTC P042E.

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.

PROCEDURE


  1. CHECK ECM (EGR VALVE POSITION SENSOR VOLTAGE)


    1. B002688C74
      *a

      Component with harness connected

      (ECM)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C59-31 (VCEG) - C59-24 (EEGL) Ignition switch ON 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ECM Click here

    OK

  2. INSPECT EGR VALVE POSITION SENSOR (EGLS VOLTAGE)


    1. B002688C75
      *a

      Component with harness connected

      (ECM)

      Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C59-25 (EGLS) - C59-24 (EEGL) Ignition switch ON 0.6 to 1.4 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR Click here

    OK

  3. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    3. Turn the ignition switch off.

    4. Turn the ignition switch to ON for 2 seconds or more.

    5. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    6. Confirm that the DTC is not output again.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    CHECK FOR INTERMITTENT PROBLEMS Click here

  4. CHECK HARNESS AND CONNECTOR


    1. B00280IC05
      *a

      Front view of wire harness connector

      (to Electric EGR Control Valve Assembly)

      Disconnect the electric EGR control valve assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C95-3 (VC) - C95-1 (E2) Ignition switch ON 4.5 to 5.5 V

    3. Reconnect the electric EGR control valve assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 8 Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (EGR VALVE POSITION SENSOR - ECM)


    1. Disconnect the electric EGR control valve assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      C95-3 (VC) - C59-31 (VCEG) Always Below 1 Ω
      C95-2 (VTA) - C59-25 (EGLS) Always Below 1 Ω
      C95-1 (E2) - C59-24 (EEGL) Always Below 1 Ω
      C95-3 (VC) or C59-31 (VCEG) - Body ground and other terminals Always 10 kΩ or higher
      C95-2 (VTA) or C59-25 (EGLS) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the electric EGR control valve assembly connector.

    5. Reconnect the ECM connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. CHECK ECM (CHECK RESISTANCE)


    1. Disconnect the electric EGR control valve assembly connector.

    2. B00280IC06
      *a

      Front view of wire harness connector

      (to Electric EGR Control Valve Assembly)

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      C95-3 (VC) - C95-2 (VTA) Ignition switch off No short or open circuit
      C95-2 (VTA) - C95-1 (E2)

    3. Reconnect the electric EGR control valve assembly connector.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO STEP 10 Click here

    OK

  7. REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY


    1. Replace the electric EGR control valve assembly.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here

  8. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.

      Result
      Proceed to
      NEXT

    NEXT

  9. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    3. Turn the ignition switch to ON for 2 seconds or more.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    5. Confirm that the DTC is not output again.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END

  10. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 9 Click here