its located just before the catalyst. Unlplug it then using an oxygen sensor socket carefully undo it. it will be very very tight due to the temperatures it experiences, be careful incase you shear it off!
How do you unplug an oxygen sensor on a 2003 Chevy Cavalier
How to replace throttle sensor kia spectra 2003
The sensor is about $75.00 to $100.00 and the labor is 1/2 hour with 1 hour diagnostics. It is best to have the diagnostics done as you may not have a bad oxygen sensor. It could be as simple as a vacuum leak.
No, you have to replace the complete tank which includes the sensor.
The Exhaust Manifold Oxygen Sensor needs to be replaced.
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.
replacing a fuel sensor on a 2003 grand prix?
Where is the knock sensor for a 2003 kia spectra
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.
the lamba sensor is located inside the maifold
pass. side rear