Hi everybody,

I have a check engine light on (the yellow one) with no problem when the car is running.

After pluging my ELM327, it reveals that it's a problem with the O2 sensor bank2 n°2 (so the after cat on the driver side I think).

I bought two O2 sensor to change the 2 after cata sensor (from BOSCH).

But the work seems to be hard!

I've removed the airbox and can access to the wirering of the sensor but I don't see how to remove the sensor. There is not enough room to manipulate the tool (especially the one on the driver side...), and the sensor is seized after all these years... Even with a night in WD40, Nothing is moving...

If you have an idea...

Thanks a lot.

 

I've tried an easy method: I've canceled the Check Engine light with the app Torque.


And it has not came back after a big drive.


But still no idea about the way to remove that hell of sensors!

 

Here's a link to the Pelican article. They are usually a good place to start.

http://www.pelicanparts.com/techarti...en_Sensors.htm

As for being seized, go with Kroil for a penetrating oil. It is much better than WD40. I've also heard that you can drive around for about 30 min so that it gets good and hot and then apply the penetrating oil. You will want to take proper safety precautions of course but Kroil is not particularly unstable.

 

Just do yourself a favor... take off the bumper cover, inner aluminum bumper... and the rear heat shield and then go to work. (takes me 20 minutes to do this myself)
You also might need to just take off the cats to do it if they are seized up.

 

we are talking a 996 right? use a 22mm wrench, lay under the rear of the car, look up at the cold exhaust system the two O-2 sensors on each side after the cat section are the after-cat O2 sensors. righty tighty lefty losey... looking at the at the stock air box,look left and you will see some wires clipped into a wire retainer, wires coming in to each side with a red thing in the middle, two of these on each side of the air box. with the o2 sensors lose, it is easy to tug on the wire pack to see which is O2 sensor in now loose. simply unplug, plug in new sensor and screw the new O2 sensor back in.

not hard at all to do.