Have a Citroen Xsara II 2.0HDi in at the moment for a service but with an airbag waring light on. Had a check of the wiring under the seats etc and all looks good, no breaks/loose connections etc. Have run diagnostic with both MaxiScan PAS goup scanner and my old Snap-On MT2500 (all makes cartridge V9.2) but both show "no faults recorded". Any ideas? Was thinking maybe a faulty crash-sensor?? Can this be reset and if so how? Any pointers most welcome..