Didn't see complete info on this code for location and part numbers, but got enough hints in multiple places that I did this job pretty easily. I thought I would do a quick little write up. This ended up being the O2 sensor on the drivers side rear sensor. It is located right under car about drivers seat area. All in all took an hour, but if I used the torch right way, probably about 30 minutes.

Part - O2 Sensor
Ordered Part Bosch LR098290 from FCP Euro for $48. When I took the old O2 Sensor out it had CPLA-9G444-HB(what it looks like).

Tools
22MM Box Wrench or O2 Sensor Socket (I didn't like using this)
Extra wrench to serve as breaker bar or the box wrench breaker tool.

Install
I first drove the car on some 2x6's and raised the air suspension all the way up. If you are small enough you can skip the block adders but it may still be nice when you are pulling like hell on the wrench. I first decided to cut the cable so I could fit the closed end wrench on the sensor to get the best grip. I tried PB Blast, then double wrench, then Torch and Double wrench before I got it to move. Simply installed new sensor, plugged it in, and cleared codes. Your light may go out as you drive with new sensor but I just cleared. Has been working great.

I will add pictures.

 

what year make and engine?