O2 Sensor not reading

[Ratty]

Can anybody help , I have replaced both o2 sensors anf the fualt is still coming up : ie code 1000 on faultmate nano . can anyone offer suggestions. Iam puling out hair

[PhilipA]

In many cars a MAF fault will show as "O2 sensors out of range" as the "limp home" mixture richens more than the o2 sensors can compensate for.
certainly this happens on BMWs with Motronic and I assume you are talking Thor?which has Motronic.
Regards Philip A