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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Controls - Self-Diagnostics - 4.0L) >> Diagnostic Tests >> DTC P0140: Ho2S Bank 1 Sensor 2 Circuit - Insufficient Activity >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 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. 5

    Check the HO2S bank 1 sensor 2 wiring, and check the powertrain control module's response. With the harness connector terminals jumpered together, the scan tool should display an HO2S bank 1 sensor 2 voltage below 150 mV.
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