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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 425 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0141: Ho2S Bank 1 Sensor 2 - Heater Performance >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number in the diagnostic procedures.

  1. 3

    The HO2S 2 should be allowed to cool before performing this test. The HO2S 2 is cool enough if the voltage output is stable at bias or, about 450 mV. If the HO2S 2 heater is functioning, the sensor element warms. If the heater is not functioning, the HO2S 2 signal will remain near the 450 mV bias voltage.

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