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Home >> Oldsmobile >> 2003 >> Aurora >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0140: Ho2S Bank 1 Sensor 2 Circuit - Insufficient Activity >> Test Description

Test Description

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

  1. 2

    A normally functioning post catalyst HO2S voltage signal will display very little activity. The HO2S 2 voltage parameter should react immediately to the changes in throttle position when performing this test.
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