E55 o2 sensor problem

[adams.e55amg]

Hi I have a error code in my e55 about o2 sensor pre cat left side I bought new sensor Bosch erased a error after few miles car getting rhis some error back ,shaking,overfuell,black smoking,...any idea where to start? No check engine light on dashboard ...

 

[Minden99]

You sorted this? What was your error code. Always helps

 

[adams.e55amg]

New o2 sensors And remaped again And helps