check engine Light 1/6 7/12

When I started my TR 512 I unplugged the O2 sensor on passenger side and 1/6 came On. Then I tried unplugging the O2 sensor on the driver side and 7/12 doesn't come on.


So I replace the computer on the driver side and now when I unplug the O2 sensors nothing happens 1/6 and 7/12 are not coming on. Even when I put back the default ECU nothing happens when I unplug the O2 sensor



If I press the Diagnostic for the both ECU's the check engine light for 1/6 and 7/12 come on.

Just a FYI. The first time I unplug the ECU I didn't disconnect the battery would that have caused any problems ?