I can't read the second picture, but if the O2 sensor is disconnected the eHA should go to 0.0ma and the duty-cycle to 50%.
The first picture denotes a rich mixture from the EHA current of minus 3ma. The duty-cycle is backwards or the polarity is backwards. A 68%duty-cycle would indicate a lean mixture.
Bosch Master, ASE Master, L1
33 years MB technician