ECD SYSTEM (w/o 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 EGR valve and is used for detecting the lift amount of the valve. The lift amount detected by the sensor is provided to the ECM as feedback. The ECM then regulates the lift amount of the valve in accordance with engine running conditions.

P0405
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 5 seconds EGR valve position sensor output voltage is below 0.1 V for more than 5 seconds (1 trip detection logic).
  • Open or short in EGR valve position sensor circuit

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

  • ECM

P0406
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 5 seconds EGR valve position sensor output voltage is more than 4.9 V for higher than 5 seconds (1 trip detection logic).
  • Open or short in EGR valve position sensor circuit

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

  • ECM

MONITOR DESCRIPTION

When the output voltage of the EGR valve position sensor deviates from the normal operating range of 0.1 to 4.9 V for more than 5 seconds, the ECM interprets this as a malfunction of the sensor circuit and illuminates the MIL.

WIRING DIAGRAM

A003EELE03

INSPECTION PROCEDURE

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. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 TERMINAL VOLTAGE (EGR VALVE POSITION SENSOR CONNECTOR)


    1. A003DGDE09
      Text in Illustration
      *a

      Front view of wire harness connector

      (to EGR Valve Position Sensor)

      Disconnect the EGR valve position sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      D52-1 (VC) - D52-2 (E2) Ignition switch ON 4.5 to 5.5 V
    3. Reconnect the electric vacuum regulating valve assembly connector.


    NG
    OK
  2. INSPECT EGR VALVE POSITION SENSOR


    1. Inspect the EGR valve position sensor Click here.


    NG
    OK
  3. CHECK HARNESS AND CONNECTOR (EGR VALVE POSITION SENSOR - ECM)


    1. Disconnect the EGR valve position sensor 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
      D52-1 (VC) - D98-75 (VC) Always Below 1 Ω
      D52-3 (EGLS) - D98-118 (EGLS) Always Below 1 Ω
      D52-2 (E2) - D98-92 (EEGL) Always Below 1 Ω
      D52-1 (VC) or D98-75 (VC) - Body ground Always 10 kΩ or higher
      D52-3 (EGLS) or D98-118 (EGLS) - Body ground Always 10 kΩ or higher
    4. Reconnect the electric vacuum regulating valve assembly connector.

    5. Reconnect the ECM connector.


    NG
    OK
  4. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT
  5. REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY


    1. Replace the electric EGR control valve assembly Click here.


    NEXT
  6. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT
  7. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Clear the DTCs Click here.

    3. Turn the ignition switch to ON for 5 seconds or more.

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

    5. Confirm that the DTC is not output again.


    NEXT