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Home >> Chevrolet >> 1996 >> Camaro Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes - 3.8L >> Diagnostic Trouble Codes >> DTC P0140 - Ho2S Insufficient Activity Sensor 2 >> Circuit Description
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Circuit Description

Heated Oxygen Sensor (HO2S) 2 refers to bank 1 sensor 2. Three-Way Catalyst (TWC) system is used to control emissions. PCM uses signal from Heated Oxygen Sensor (HO2S) behind TWC to read efficiency of TWC. PCM will set DTC P0140 if TWC oxygen storage capacity is less than a predetermined threshold.

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