I know this subject has been covered many, many times before but I though this may be interesting to compare how you do it  vs how a Bosch factory integrator did the Secondary O2 off (this was discovered using differential analysis tool I wrote for my SAK tool, the car was destined for GULF states back in the day when in UAE nobody cared about emissions.). Ferrari officially fitted 'hollow' cats for those regions, lol

off       on
0x00 - 0x01   CDHSH
0x00 - 0x01   CDHSHE
0x00 - 0x01   CDLSH

0x01 - 0x03   CWKONLS - Configuration of O2 Sensors

0xF3 - 0x33   ESKONF_L        *on/off o2 heater
0xF3 - 0x33   ESKONF_R        *on/off o2 heater

0x01 - 0x00   CLRSHK    Codeword for enabling LRSHK and selection of initialization   
0xFE - 0x06   MSAPLMN   Lower threshold for plausibility test LSU Sts

0xFE - 0xC0   USHKFT    Probe voltage threshold for detection of exhaust gas rich behind catalytic converter [DLSU]
0x01 - 0x3A   USHKMR    Probe voltage threshold for detection of exhaust gas lean behind catalytic converter [DLSU]

0x32 - 0x4A   TKADPL    Catalyst temperature for plausibility check
   
0x02 - 0x18   TMDTKA    Motor temperature for diagnosis cat temperature

0x01 - 0xCD   LAMMN     Minimum plausibility threshold for lambda (16-bits)
0x00 - 0x0C

0xFE - 0x33   LAMMX     Maximum plausibility threshold for lambda (16-bits)
0xFF - 0x13

0x01 - 0xF0   LSUNAMN   Lower threshold for LSU not active (16-bits)
0x00 - 0x0F

0xFE - 0x14   LSUNAMX   Upper threshold for LSU not active (16-bits)
0xFF - 0x10

0xFE - 0x8F   SDLAOF:   Threshold Delta Lambda Offset Controller behind cat (16-bits)
0x7F - 0x02

0x00 - 0x70  TDTKA:    Time for diagnosis of cat_temperature (16-bits)
0x00 - 0x17