unplug from loom, get big spanner and unscrew from exhaust. refit in reverse
How do you unplug an oxygen sensor on a 2003 Chevy Cavalier
This will be located probably just before the catalytic converter on the exhaust
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It is the oxygen sensor.
The bank 1 oxygen sensor on a 2003 Ford Taurus is located on the motor. It is on the top, back part near the firewall.
Find very good instructions with photos at: http://matrixowners.com/topic/72977-diy-how-to-change-an-oxygen-sensor-in-a-matrix/ I used them and they are easy to follow. Replacement time 15 minutes.
the lamba sensor is located inside the maifold
pass. side rear
A 2003 Chrysler van has two oxygen sensors in the exhaust pipe on the rear of the engine.
the bank 1 sensor 1 is located in the header right before the cat ans is easy to access from the front of the car. bank 2 sensor 2 is located after the cat and the heat shield can make it difficult to turn