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Home › Nissan-Datsun › 2008 › Altima Hybrid › Repair and Diagnosis › Engine Performance › Engine Control Systems › Engine Control System (Hybrid) › Component Diagnosis › P0139 Ho2S2 › Component Inspection

Component Inspection

  1. INSPECTION START

    Do you have CONSULT-III?

    Do you have CONSULT-III? 

    YES : GO TO 2.

    NO : GO TO  3.

  2. CHECK HEATED OXYGEN SENSOR 2-I

    With CONSULT-III 

    1. Activate "INSPECTION MODE 1 " to start engine, and warm up engine to the normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Turn ignition switch ON.
    4. Turn ignition switch OFF and wait at least 10 seconds.
    5. Turn ignition ON (READY) and select "DATA MONITOR" mode with CONSULT-III.
    6. Drive vehicle at a speed of 80 km/h (50 MPH) or more for at least 3 consecutive minutes.
      CAUTION: Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
      NOTE: Keep the vehicle speed as steady as possible during the cruising.
    7. Stop vehicle and shift the selector lever to P position.
    8. Select "FUEL INJECTION" in "ACTIVE TEST" mode, and select "HO2S2 (B1)" as the monitor item with CONSULT-III.
    9. Check "HO2S2 (B1)" at idle speed when adjusting "FUEL INJECTION" to ±25%.
      Fig 1: Voltage Graph
      G05694991Courtesy of NISSAN MOTOR CO., U.S.A.

      "HO2S2 (B1)" should be above 0.68V at least once when the "FUEL INJECTION" is +25%. 

      "HO2S2 (B1)" should be below 0.18V at least once when the "FUEL INJECTION" is -25%. 

    Is the inspection result normal? 

    YES : INSPECTION END

    NO : GO TO  4.

  3. CHECK HEATED OXYGEN SENSOR 2-II

    Without CONSULT-III 

    1. Activate "INSPECTION MODE 1 " to start engine, and warm up engine to the normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Turn ignition switch ON.
    4. Turn ignition switch OFF and wait at least 10 seconds.
    5. Turn ignition ON (READY) and drive vehicle at a speed of 80 km/h (50 MPH) or more for at least 3 consecutive minutes.
      CAUTION: Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
      NOTE: Keep the vehicle speed as steady as possible during the cruising.
    6. Stop vehicle and shift the selector lever to P position.
    7. Check the voltage between ECM harness connector and ground under the following condition.
      VOLTAGE SPECIFICATION

      ECM Ground Condition Voltage
      Connector Terminal
      F13 33 (HO2S2 signal) Ground Fully depress the accelerator pedal and keep it, then fully release accelerator pedal. The voltage should be above 0.68V at least once during this procedure.
      The voltage should be below 0.18V at least once during this procedure.

    Is the inspection result normal? 

    YES : INSPECTION END

    NO : GO TO 4.

  4. REPLACE HEATED OXYGEN SENSOR 2

    Replace heated oxygen sensor 2.

    CAUTION:
    • Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
    • Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

    INSPECTION END

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