RSX L4-2.0L (VTEC) (2002)
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Oxygen Sensor: Description and Operation
Heated Oxygen Sensor
Secondary Heated Oxygen Sensor (Secondary HO2S)
The secondary HO2S detects the oxygen content in the exhaust gas downstream of the Three Way Catalytic Converter (TWC) and sends signals to the
ECM/PCM which varies the duration of fuel injection accordingly. To stabilize its output, the sensor has an internal heater. The secondary HO2S is
installed in the TWC.
