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HOMESERVICE MANUALSCHEVROLET2019TAHOE LS, 4WD, GAS/ETHANOLREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 32 (ENGINE CONTROLS/FUEL - 1.4L (LUV) - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSHEATED OXYGEN SENSOR REPLACEMENT - SENSOR 2
2019 Chevrolet Tahoe LS, 4WD, Gas/Ethanol

Heated Oxygen Sensor Replacement - Sensor 2

2019 Chevrolet Tahoe LS, 4WD, Gas/EthanolSECTION Heated Oxygen Sensor Replacement - Sensor 2
WARNING: This page is about a different car, the 2018 Chevrolet Sonic. However, it is still accessible from the selected car via links, so may be relevant.
GM2671293Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
WARNING:

In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1 Heated Oxygen Sensor 2
CAUTION:

Refer to Component Fastener Tightening Caution .

Procedure

  1. Disconnect electrical connector.
  2. After replacement of the heated oxygen sensor, use a scan tool to speed up learn functions. Refer to K20 Engine Control Module: Programming and Setup .
  3. If reusing the heated oxygen sensor, coat the thread with assembly paste.
  4. Perform the HO2S heater learn. HO2S Heater Learn .
  5. Perform the HO2S heater resistance learned values reset. HO2S Heater Resistance Learned Values Reset .

Tighten 
42 N.m (31 lb ft)
Special Tools 
EN-48259  Installer/Remover
For equivalent regional tools, refer to Special Tools (Diagnostic Tools)
RENDER: 1.0x

NO RELATED

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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.