Sorry guys for making another thread. Searched for old threads and no real answer.
2006 E55. Stock no problem.
Now Kleeman headers, pulley, tune, belt wrap and other bolt ons. Codes p2096 and p2098.
Couple thinks I found out at tuner today. Rear 02's are turned off in tune but on when going through Star. Tried to turn off but his developer mode was acting up and wouldn't turn them off.
Turner says replace primary 02's there alittle out of range???
Any thoughts? My cost from work is $200ea for 02's. Don't want to spend $400 on a maybe. Thanks for any help.

 

Bramage posted a link to amazon for like around 80$ each

 

http://www.amazon.com/gp/aw/d/B000BZG98G/ref=mp_s_a_1_1?qid=1413599873&sr=8-1

Here you go

 

Thank you Hulk! Just ordered 2! See if this works

 

Had the same codes after installing LTH. Only fix is to turn off rear O2's via STAR.

 

I had my car for 2.5 years with LTH, a VRP tune and no CELs. I decided to get a new tune for the hell of it from a different tuner and have been getting P2096 since. I've replaced the primary o2 sensors and the rears are supposedly turned off in my tune and still have the code. Does anyone know if this code will actually affect the way the ecu fuels the engine or is it strictly an emissions warning?