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The rear oxygen sensor is located in the front section of the rear catalytic converter. On the 2.2L engine the front (A/F) oxygen sensor is located in the front section of the front catalytic converter. The rear oxygen sensor is located in the rear section of the rear catalytic converter.
The oxygen (O2) sensor in a vehicle is mounted in the exhaust manifold, and it measures the oxygen content in the exhaust... 1  How to Replace a Sensor in a 1999 Honda CRV.ollow the wire of the O2 sensor to the plug and unplug it. Use the flathead screwdriver to press in the clip lock and separate the plug. Place the oxygen sensor socket onto the ratchet and remove the O2 sensor from the exhaust pipe.