please help dtc airbag temic citroen c5 P1f40 internal defect ecu ,van interface

[klonone]

hello i have problem with airgab citroen c5 2003 ,, ecu airbag always fault P1f40 internal error , van interface
please help
i change airbag ecu and same problem
sac_temic
9644.031.80
v 0.31

thanks alls