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Home >> Kia >> 2005 >> Rio Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System/Fuel System >> Fuel System Monitoring >> Engine Control Components >> Front Ho2 Sensor

Front Ho2 Sensor

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The front (upstream) HO2 Sensor is located in the exhaust downpipe after the TWC and provides an input voltage to the ECM. The input tells the ECM the oxygen content of the exhaust gas. The ECM uses this information to fine tune the air/fuel ratio by adjusting injector pulse width.

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