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Home >> Hummer >> 2010 >> H3T Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.7L - Repair Instructions >> Repair Instructions >> Heated Oxygen Sensor Replacement - Sensor 1 >> Notes
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Heated Oxygen Sensor Replacement - Sensor 1: Notes

Special Tools 

J-39194-B:  Heated Oxygen Sensor Wrench

CAUTION: When replacing the HO2S perform the following:
  • A code clear with a scan tool, regardless of whether or not a DTC is set
  • HO2S heater resistance learn reset with a scan tool, where available

Perform the above in order to reset the HO2S resistance learned value and avoid possible HO2S failure.