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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 385 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.2L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSHEATED OXYGEN SENSOR 1 REPLACEMENTINSTALLATION PROCEDURE
2006 Isuzu Ascender S, 5.3 M, 4WD

Installation Procedure

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Installation Procedure
WARNING: This page is about a different car, the 2008 Isuzu Ascender, 2008 GMC Envoy, and 2008 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: A special anti-seize compound is used on the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burns away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.
    Fig 1: View Of HO2S Electrical Connector
    GM1923757Courtesy of GENERAL MOTORS CORP.
  1. If reinstalling the old sensor, coat the threads with the anti-seize compound P/N 12377953, or equivalent.
    2. NOTE: Refer to Component Fastener Tightening Notice .
  2. Install the HO2S (1). Use the J 39194-B  , if required. See Special Tools .

    Tighten:  Tighten the HO2S to 42 N.m (31 lb ft).

    3. Fig 2: View Of Electrical Connectors
    GM1923753Courtesy of GENERAL MOTORS CORP.
  3. Connect the engine wiring harness electrical connector (2) to the HO2S electrical connector (1).
  4. Install the HO2S electrical connector (1) clip to the transmission fluid fill tube bracket.
  5. Install the CPA retainer to the HO2S connection.
RENDER: 1.0x

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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.