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Home >> Geo >> 1995 >> Prizm Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 1.8L >> Computerized Engine Controls >> Input Devices >> Sub-Heated Oxygen (Sub-HO2S) Sensor
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Sub-Heated Oxygen (Sub-HO2S) Sensor

Sub-HO2S is mounted in exhaust system, after Three-Way Catalytic Converter (TWC). Sub-HO2S sensor checks oxygen level in exhaust after TWC and sends reference signal to ECM. This provides a more precise fuel injector control.

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