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HOMESERVICE MANUALSINFINITI2006FX35 AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 6 (ENGINE CONTROL SYSTEM - DTCS P0137 TO P0448 (VK45DE))DTC P0137, P0157 HO2S2OVERALL FUNCTION CHECKWITH GST
2006 Infiniti FX35 AWD

With GST

2006 Infiniti FX35 AWDSECTION With GST
WARNING: This page is about a different car, the 2006 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.
  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 55 [HO2S2 (B1) signal] or 74 [HO2S2 (B2) signal] and ground.
  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 can be confirmed in step 6, step 7 is not necessary. 

  7. Keep vehicle at idling for 10 minutes, then check the voltage. Or check the voltage when coasting from 80 km/h (50 MPH) in D position.

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

  8. If NG, go to "DIAGNOSTIC PROCEDURE ".
    Fig 1: Identifying Voltage
    G04074785Courtesy of NISSAN MOTOR CO., U.S.A.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.