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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 81 (Engine Controls - Self-Diagnostics - 8.1L) >> Diagnostic Tests >> DTC P0141: Ho2S Heater Circuit - Bank 1, Sensor 2 >> Test Description

Test Description

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The numbers below refer to the step numbers in the diagnostic procedures.

  1. 2

    After the HO2S heater is commanded ON, the HO2S heater heats up, causing the HO2S signal voltage to either increase or decrease. This indicates that the HO2S heater is okay.

  2. 10

    Resistance within the specified range indicates the HO2S heater is okay.
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