Could anyone please confirm should I change CWKONLS to 17 (11 hex) on 1.8t?
Stock value is 3 (not 33 in hex) thats why I'm not sure about it.

I'm trying to disable rear O2 lambda control

But according to S4 wiki and some threads, CWKONLS shoud be changed also.

The S4 wiki relates CWKONLS as rear lambda control.

The wiki refers you to this page listed below.
http://nefariousmotorsports.com/forum/index.php?topic=2980.msg29108#msg29108


Ive read stock value is 3 and comes up as 3 on my stock 1.8T BAM 018CB file.

The 1.8t and 2.7t coding for CWKONLS are different. 2.7 had two banks and 1.8 has 1.

Set/clear the proper bits for your setup and convert bin->dec. it's really simple with windows calculator.

Here is clear description, might be useful for others, found in FR of ME7.3, section APP GGLSH 3.30 Application hint
CWKONLS :
----------->
Code word in % PROKON :
Sensors present upstream of the catalyst --->
Bank1: B lsv by Bit 0 = 1
Bank2: B lsv2 by Bit 4 = 16
(gives 17 as the sum)

Sensors present downstream of the catalyst -->
Bank1: B lsh by bit 1 = 2
Bank2: B lsh2 by bit 5 = 32
(gives 34 as the sum)
For all 4 installed seensors: CWKONLS = 51

Set it to 1 dec

Yes