FRONT HEATED OXYGEN SENSOR (HO2S) FUNCTION [ZY]

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• The wide-range air/fuel ratio sensor, which can linearly detect the oxygen concentration (air/fuel ratio of the air-fuel mixture) in the exhaust gas in all ranges, from lean to rich, is used on the front HO2S.

• A heater has been adopted on the front HO2S, allowing stable detection of the oxygen concentration even when the exhaust gas temperature is low.