Citroen C4 AirBag Issue

Hello all AP members.

I have one problem in Citroen C4.
She had a stroke and jumped airbags, pretensioners and change the two front airbags.
Reset the UCE Airbag and all good.
Now only marks fault stage 1 driver airbag circuit (failure COM2000).
Someone noticed this?
It is the problem of wiring or programming pin?
A company told me that they did repaired.
I appreciate your help.

Thanks for all and best regards!