Dtc P042E Exhaust Gas Recirculation A Control Stuck Open

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P042E)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

CHECK FOR DEPOSIT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P042E Exhaust Gas Recirculation "A" Control Stuck Open


DESCRIPTION

The EGR system recirculates exhaust gases. The recirculated gas mingles with the intake air so that the EGR system can slow combustion speed and keep the combustion temperature down. This helps reduce NOx emissions.
In order to increase EGR circulation efficiency, the ECM adjusts the EGR valve angle and the throttle valve angle.

P042E
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
After warming up engine and idling for 60 seconds, maintain engine speed at 2500 rpm for 40 seconds, drive vehicle, and perform engine brake deceleration by fully closing accelerator when engine speed is 2000 rpm or more.
The target and actual positions of the EGR valve are different for 20 seconds or more.
(1 trip detection logic)
  1. EGR valve stuck
  2. EGR valve does not move smoothly
  3. EGR valve deposit
  4. ECM
While the engine is running, the EGR activation duty exceeds the threshold for 0.5 seconds a certain number of times (40 seconds or more).
(1 trip detection logic)

Related Data List
DTC No.
Data List
P042E
  1. MAF
  2. MAP
  3. EGR Close Lrn. Val.
  4. EGR Close Lrn. Status
  5. Target EGR Position
  6. Actual EGR Valve Pos.
HINT:
  1. Actual EGR valve opening percentage: Fully closed = 0%, fully open = 100%.
  2. If DTC P042E is stored, the following symptoms may appear:
    1. Stuck closed malfunction
      1. Lack of power: due to fail-safe operation (only for vehicle with DPF catalyst)
      2. Intake booming noise
      3. Slight combustion noise
    1. Stuck open malfunction
      1. Black smoke
      2. Lack of power
      3. Vibration at engine stop
      4. Misfire
      5. White smoke
      6. Engine stall

MONITOR DESCRIPTION

When the target and actual positions of the EGR valve are different, the ECM interprets this as a malfunction of the electric EGR control valve assembly and illuminates the MIL (1 trip detection logic).

Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P042E Exhaust Gas Recirculation A Control Stuck Open

HINT:
  1. If a large amount of carbon deposits exists in the electric EGR control valve assembly, the following parts possibly also have deposits inside: The intake manifold, EGR cooler assembly, exhaust fuel addition injector assembly (if equipped), DPF catalyst, and other parts related to the exhaust gas.
  2. Be sure to carefully examine "Actual EGR Valve Pos.", "Target EGR Position" and "MAF" in the freeze frame data.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P042E Exhaust Gas Recirculation A Control Stuck Open


INSPECTION PROCEDURE

NOTICE:
  1. When cleaning the electric EGR control valve assembly or diesel throttle body assembly, use a piece of cloth soaked with cleaning solvent. Spraying the solvent directly onto these parts or soaking the parts in solvent may damage the parts.
  2. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  3. After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK059X.html) and initialization (HILUX_TGN26 RM000000TIN057X.html).
  4. After replacing the fuel supply pump assembly, the ECM needs initialization (HILUX_TGN26 RM000000TIN057X.html).
  5. After replacing an injector assembly, the ECM needs registration (HILUX_TGN26 RM0000012XK059X.html).
HINT:
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.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P042E)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P042E is output
    		A
    P042E and other DTCs are output
    		B
    HINT:
    If any DTCs other than P042E are output, troubleshoot those DTCs first.


B
GO TO DTC CHART (HILUX_TGN26 RM0000031HW031X.html)
A


2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position / Data List / Target EGR Position and Actual EGR Valve Pos.

  1. When changing the Active Test value for 0, 25, 50, 75 and 100%, check that Actual EGR Valve Pos. smoothly changes to the set opening angle.

    OK:
    The Actual EGR Valve Pos. value follows the Target EGR Position value.


NG
Go to step 4
OK


3.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

  1. Remove the electric EGR control valve assembly (HILUX_TGN26 RM000004QWK008X.html).

  1. Reconnect the electric EGR control valve assembly connector.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

  1. Check if the valve of the electric EGR control valve assembly opens/closes when an Active Test is performed.

    OK:
    The valve opens/closes.


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P042E Exhaust Gas Recirculation A Control Stuck Open

  1. Hold the electric EGR control valve assembly up to a light, and then from the side indicated by the arrow in the illustration, visually check that there is no gap between the valve and body.

    OK:
    No light passes through (there is no gap between the valve and body).
    Result
    Result
    		Proceed to
    NG
    		A
    OK
    		B
    Text in Illustration
    *1
    		Gap
    *a
    		OK
    *b
    		NG
    HINT:
    1. If light passes through (there is a gap between the valve and body), replace the electric EGR control valve assembly.
    2. Light passes through part A shown in the illustration even if the valve is completely closed. This is not a problem.
    3. Remove the deposits if there are many deposits in the electric EGR control valve assembly or the passage of the intake manifold.

  1. Reinstall the electric EGR control valve assembly (HILUX_TGN26 RM000004QWH008X.html).



B
Go to step 5
A


4.REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

  1. Replace the electric EGR control valve assembly (HILUX_TGN26 RM000004QWK008X.html).

    HINT:
    Before replacing the electric EGR control valve assembly, check the connections of the wire harness and connectors. If there is any abnormality, replace or repair the wire harness or connector.


NEXT
Go to step 6

5.CHECK FOR DEPOSIT

  1. Remove the electric EGR control valve assembly (HILUX_TGN26 RM000004QWK008X.html).

  1. Visually check the electric EGR control valve assembly for deposits.
    If there are deposits, clean the electric EGR control valve assembly.

    NOTICE:
    1. When cleaning the electric EGR control valve, make sure the valve is completely closed.
    2. Do not forcibly open the valve, as it may be damaged or deformed.
    3. When cleaning the electric EGR control valve, use a piece of cloth soaked with cleaning solvent. Spraying the solvent directly onto these parts or soaking the parts in the solvent may damage the parts.
    4. When cleaning the EGR control valve, care should be taken to prevent the ingress of cleaning solvent into the bearings of valve shaft, and when wiping off deposits on the EGR control valve, care should be taken not to push the deposits into the bearings of valve shaft. These contaminants may adversely affect on the function of EGR control valve.
    HINT:
    1. If the EGR valve does not open properly or is stuck closed, the amount of intake air increases and combustion sounds and engine vibration may increase.
    2. If the EGR valve does not close properly or is stuck open, EGR becomes excessive and combustion becomes unstable. Also, there may be a lack of power.

  1. Reinstall the electric EGR control valve assembly (HILUX_TGN26 RM000004QWH008X.html).


NEXT


6.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X3X.html).

  1. Turn the ignition switch off and wait for 30 seconds or more.

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

  1. After warming up engine and idling for 60 seconds, maintain engine speed at 2500 rpm for 40 seconds, drive vehicle, and perform engine brake deceleration by fully closing accelerator when engine speed is 2000 rpm or more.

    CAUTION:
    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Confirm that the DTCs is not output again.


NEXT

END