CR-V EX 4WD L4-1972cc 2.0L DOHC MFI (2000)
Oxygen Sensor: Description and Operation
Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1)
The Heated Oxygen Sensors (HO2S) detect the oxygen content in the exhaust gas and signal the ECM/PCM. In operation, the ECM/PCM receives the
signals from the sensor and varies the duration during which fuel is injected. To stabilize the sensor's output, the sensor has an internal heater. The
Primary HO2S (Sensor 1) is installed in exhaust pipe A.
