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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1123 (Engine Control System - DTCS P0137 Through P0447) >> DTC P0137, P0157 Ho2S2 >> Component Inspection >> Heated Oxygen Sensor 2

Heated Oxygen Sensor 2

WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

With CONSULT-II 

  1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-II.
  2. Start engine and warm it up to the normal operating temperature.
  3. Turn ignition switch OFF and wait at least 10 seconds.
  4. Start engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
  5. Let engine idle for 1 minute.
    Fig 1: CONSULT-II Display - Data Monitor
    G04900167Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Select "FUEL INJECTION" in "ACTIVE TEST" mode, and select "HO2S2 (B1)/(B2)" as the monitor item with CONSULT-II.
    Fig 2: CONSULT-II Display - Active Test
    G04900304Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Check "HO2S2 (B1)/(B2)" at idle speed when adjusting "FUEL INJECTION" to ±25%.
    Fig 3: HO2S2 (B1)/(B2) Voltage Signal
    G04905358Courtesy of NISSAN MOTOR CO., U.S.A.

    "HO2S2 (B1)/(B2)" should be above 0.78V at least once when the "FUEL INJECTION" is +25%  .

    "HO2S2 (B1)/(B2)" should be below 0.18V at least once when the "FUEL INJECTION" is -25%  .

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.

Without CONSULT-II 

  1. Start engine and warm it up to the normal operating temperature.
  2. Turn ignition switch OFF and wait at least 10 seconds.
  3. Start engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
  4. Let engine idle for 1 minute.
  5. Set voltmeter probes between ECM terminal 74 [HO2S2 (B1) signal] or 55 [HO2S2 (B2) signal] and ground.
    Fig 4: Checking Voltage Between ECM Terminal 74 And Ground
    G04875087Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Check the voltage when revving up to 4, 000 rpm under no load at least 10 times.

    (Depress and release accelerator pedal as soon as possible.)

    The voltage should be above 0.78V at least once during this procedure  .

    If the voltage is above 0.78V at step 6, step 7 is not necessary  .

  7. Keep vehicle at idling for 10 minutes, then check voltage.

    Or check the voltage when coasting from 80 km/h (50 MPH) in D position.

    The voltage should be below 0.18V at least once during this procedure  .

  8. If NG, replace malfunctioning 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.
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