Hello all,

My service engine soon light came on and I took a trip to Auto Zone. The gentlemen told me that the oxygen sensor is the reason the light came on. Apparently the code reader said Bank 1 Sensor 2. Auto Zone did not carry the part needed and when I go on Atlantic British I see two different items I can buy Oxygen Sensor Front, and Oxygen Sensor Rear. Which is the correct one, and should I look at replacing both? My knowledge about car repair is basic at best however the gentlemen at auto zone said it was very easy and offered to install it for me free of charge. So a little advice from everyone here would be greatly appreciated! How many oxygen sensors are there and at 55,000 miles should I look at replacing all of them??? This is a 2002 P38 Range Rover....

Thank you all in advance!

 

I believe there are 4 oxygen sensors. It is usually wise to replace all of them. However, if you are cheap like me you can just replace the one. I would refer to the service manual for more information on which one it is exactly. You can download the service manual at greenoval.com

 

bank one driver side of engine left hand drive markets.
sensor two is downstream oxygen sensor after the catalytic converter.

 

Was that the only code? I have had a misfire code as well that will say the O2 sensor is having an issue as well. If it was having a misfire as well I bet the sensor is fine.

With 55K the miles are low but the age is there.