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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 215 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (2 Of 6)) >> DTC/Circuit Diagnosis >> DTC P0238-00: Boost Pressure Sensor High >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC PRIORITY 
    1. Turn ignition switch ON.
    2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
    3. Check for DTC P0652-00 or P0653-00 being current on the CONSULT screen.

    Is applicable DTC detected as current?

    YES

    Refer to DTC Index .

    NO

    GO TO 2 .

  2. CHECK DTC PRIORITY 
    1. Turn ignition switch ON.
    2. Connect CONSULT and check for ENGINE diagnostic trouble codes.
    3. Check for DTC P0238 being current on the CONSULT screen.

    Is DTC P0238-00 detected as current?

    YES

    GO TO 3 .

    NO

    Refer to Intermittent Incident .

  3. INSPECT LOW PRESSURE TURBOCHARGER BOOST PRESSURE SENSOR AND CONNECTOR PINS 
    1. Turn ignition switch OFF.
    2. Disconnect low pressure turbocharger boost pressure sensor harness connector F105.
    3. Inspect the harness connector and low pressure turbocharger boost pressure sensor pins for the following:
      • Loose connector
      • Corroded pins
      • Bent or broken pins
      • Pushed back or expanded pins
      • Moisture in or on the connector
      • Missing or damaged connector seals
      • Dirt or debris on or in the connector pins
      • Connector shell broken
      • Wire insulation damage
      • Damaged connector locking tab

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Repair or replace error-detected parts.

  4. CHECK THE CIRCUIT RESPONSE 
    1. Turn ignition switch OFF.
    2. Disconnect low pressure turbocharger boost pressure sensor harness connector F105.
    3. Turn ignition switch ON and wait 30 seconds.
    4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.

    Did P0237-00 DTC become current and P0238-00 become past?

    YES

    GO TO 5 .

    NO

    GO TO 10 .

  5. CHECK THE SENSOR SUPPLY VOLTAGE AND RETURN CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect the low pressure turbocharger boost pressure sensor harness connector F105.
    3. Turn ignition switch ON.
    4. Measure the voltage between low pressure turbocharger boost pressure sensor harness connector F105 terminals 1 and 2.

      Low pressure turbocharger boost pressure sensor

      Voltage

      (Approx.)

      Connector

      Terminal

      Terminal

      F105

      1

      2

      4.75-5.25

    Is inspection result normal?

    YES

    GO TO 6 .

    NO

    GO TO 7.

  6. CHECK DTCS AND SENSOR CONDITION 
    1. Turn ignition switch OFF.
    2. Disconnect low pressure turbocharger boost pressure sensor harness connector F105.
    3. Turn ignition switch ON and wait 30 seconds.
    4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.

    Did DTC P0238-00 become current?

    YES

    Replace low pressure turbocharger boost pressure sensor. Refer to Removal and Installation .

    NO

    The removal and installation of the connector corrected the malfunction.

  7. INSPECT ECM AND HARNESS CONNECTOR PINS 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector F101.
    3. Inspect the ECM connector pins for the following:
      • Loose connector
      • Corroded pins
      • Bent or broken pins
      • Pushed back or expanded pins
      • Moisture in or on the connector
      • Missing or damaged connector seals
      • Dirt or debris on or in the connector pins
      • Connector shell broken
      • Wire insulation damage
      • Damaged connector locking tab

    Is the inspection result normal?

    YES

    GO TO 8 .

    NO

    Repair or replace error-detected parts.

  8. CHECK THE ECM RESPONSE 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector F101.
    3. Turn ignition switch ON and wait 30 seconds.
    4. Connect CONSULT and check for current ENGINE diagnostic trouble codes.

    Did DTC P0237-00 become current and P0238 become past?

    YES

    GO TO 9 .

    NO

    Replace ECM. Refer to Removal and Installation .

  9. CHECK DTC PRIORITY 
    1. Connect all components.
    2. Turn ignition switch ON.
    3. Connect CONSULT and check for ENGINE diagnostic trouble codes.
    4. Check for DTC P0238-00 being past on the CONSULT screen.

    Is DTC P0238-00 detected as past?

    YES

    The removal and installation of the connector corrected the issue.

    NO

    Repair or replace harness for a pin-to-pin short.

  10. INSPECT ECM AND HARNESS CONNECTOR PINS 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector F101.
    3. Inspect the ECM connector pins for the following:
      • Loose connector
      • Corroded pins
      • Bent or broken pins
      • Pushed back or expanded pins
      • Moisture in or on the connector
      • Missing or damaged connector seals
      • Dirt or debris on or in the connector pins
      • Connector shell broken
      • Wire insulation damage
      • Damaged connector locking tab

    Is the inspection result normal?

    YES

    GO TO 11 .

    NO

    Repair or replace error-detected parts.

  11. CHECK THE SENSOR SUPPLY VOLTAGE AND RETURN CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect the ECM harness connector F101.
    3. Turn ignition switch ON.
    4. Measure the voltage between terminal 106 and 196 at the ECM connector F101.

      ECM

      Voltage

      (Approx.)

      Connector

      Terminal

      Terminal

      F101

      106

      196

      4.75-5.25

    Is inspection the result normal?

    YES

    GO TO 12.

    NO

    Replace the ECM. Refer to Removal and Installation .

  12. CHECK DTC PRIORITY 
    1. Connect all components.
    2. Turn ignition switch ON.
    3. Connect CONSULT and check for ENGINE diagnostic trouble codes.
    4. Check for DTC P0238-00 being past on the CONSULT screen.

    Is the inspection result normal?

    YES

    The removal and installation of the connector corrected the issue.

    NO

    Repair or replace the harness for an open circuit.

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