ECD SYSTEM, Diagnostic DTC:P1412

DTC Code DTC Name
P1412 Dynamic Plausibility Test

DESCRIPTION

The differential pressure sensor (exhaust gas pressure sensor) is fixed to the engine by a holder to protect it from high temperatures.

The differential pressure sensor (exhaust gas pressure sensor) is connected to the exhaust manifold via a hose and pipe, and detects the exhaust gas system pressure downstream of the oxidation catalyst.

The differential pressure sensor (exhaust gas pressure sensor) is supplied with 5 V from the ECM and has a measurement range between 60 kPa (0.6 bar) to 200 kPa (2.0 bar). This is equivalent to 1.875 to 4.5 V.

DTC No. DTC Detection Condition Trouble Area
P1412

Filtered differential pressure (exhaust gas pressure) is less than positive minimum value or greater than negative minimum value

(3 trip detection logic)

  • Open or short in differential pressure sensor (exhaust gas pressure sensor) circuit

  • Differential pressure sensor (exhaust gas pressure sensor)

  • Differential pressure sensor (exhaust gas pressure sensor) pipe

  • Exhaust manifold converter subassembly (DPF catalytic converter)

  • ECM

INSPECTION PROCEDURE

Note

When replacing the ECM, the ECM needs Registration and Initialization Click here.

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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 DIFFERENTIAL PRESSURE SENSOR (EXHAUST GAS PRESSURE SENSOR) AIR HOSE CONNECTION


    1. Check that the differential pressure sensor (exhaust gas pressure sensor) air hose is securely installed.

      OK
      Part is securely installed.

    NG

    CONNECT AIR HOSE Click here

    OK

  2. CHECK WHETHER DTC OUTPUT RECURS (DTC P1412)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Start the engine [B].

    6. Depress the accelerator pedal several times and stop the engine [C].

    7. Repeat [A] through [C] for the number of trips detected.

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

    9. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P1412 B

    B

    CHECK DIFFERENTIAL PRESSURE SENSOR (EXHAUST GAS PRESSURE SENSOR) Click here

    A

    END

  3. CHECK DIFFERENTIAL PRESSURE SENSOR (EXHAUST GAS PRESSURE SENSOR)


    1. Check for DTCs related to the differential pressure sensor (exhaust gas pressure sensor).

      OK
      DTCs related to the differential pressure sensor (exhaust gas pressure sensor) are not output.

    NG

    REPAIR OR REPLACE DIFFERENTIAL PRESSURE SENSOR (EXHAUST GAS PRESSURE SENSOR) Click here

    OK

  4. CHECK EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER)


    1. Check that the DPF catalytic converter is installed.

      OK
      DPF catalytic converter is installed.

      Tech Tips

      If the DPF catalytic converter is not installed, the exhaust tail pipe turns black from soot.

    2. Check that the DPF catalytic converter is not damaged.

      OK
      DPF catalytic converter is not damaged.

      Tech Tips


      • If the DPF catalytic converter is damaged, the exhaust tail pipe and edge of the filter turn black from soot.

      • Disconnect the front exhaust pipe assembly from the exhaust manifold converter sub-assembly (DPF catalytic converter) and check for soot stuck inside the exhaust manifold converter sub-assembly (DPF catalytic converter).


    NG

    INSTALL OR REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER) Click here

    OK

  5. REPLACE DIFFERENTIAL PRESSURE SENSOR


    1. Replace the differential pressure sensor (exhaust gas pressure sensor) Click here.


    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P1412)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Start the engine [B].

    6. Depress the accelerator pedal several times and stop the engine [C].

    7. Repeat [A] through [C] for the number of trips detected.

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

    9. Read the DTCs.

      Result
      Result Proceed to
      No DTC output A
      DTC P1412 B

    B

    REPLACE ECM Click here

    A

    END

  7. CONNECT AIR HOSE


    1. Connect the air hose.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. REPAIR OR REPLACE DIFFERENTIAL PRESSURE SENSOR (EXHAUST GAS PRESSURE SENSOR)


    1. Repair or replace differential pressure sensor (exhaust gas pressure sensor) or perform inspections and troubleshooting for related DTCs Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  9. INSTALL OR REPLACE EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY (DPF CATALYTIC CONVERTER)


    1. Install or replace the exhaust manifold converter sub-assembly (DPF catalytic converter) Click here.

    2. Perform DPF history information reset Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  10. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Start the engine [B].

    6. Depress the accelerator pedal several times and stop the engine [C].

    7. Repeat [A] through [C] for the number of trips detected.

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

    9. Confirm that the DTC is not output again.


    NEXT

    END