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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Engine Controls Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0134: Ho2S Circuit - Insufficient Activity (Bank 1; Sensor 1 - SOHC) >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The normal scan tool voltage varies between 150-850 millivolts (0.15-0.85 volt) when in a closed loop operation.

An intermittent could be the result of a faulty electrical connection, rubbed-through wire insulation or a broken wire inside the insulation.

Inspect for a faulty electrical connection or a damaged harness. Inspect the harness electrical connectors for improper mating, broken locks, improperly formed electrical connectors, damaged terminals, faulty terminal-to-wire connection or damaged harness.

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